Imperial College London

DrPerJonsson

Faculty of Natural SciencesDepartment of Physics

Senior Instrument Manager
 
 
 
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Contact

 

+44 (0)20 7594 7819per.jonsson Website

 
 
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Location

 

536Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

714 results found

Abazov VM, Abbott B, Acharya BS, Adams M, Adams T, Agnew JP, Alexeev GD, Alkhazov G, Alton A, Alves GA, Antchev G, Askew A, Aspell P, Assis Jesus ACS, Atanassov I, Atkins S, Augsten K, Aushev V, Aushev Y, Avati V, Avila C, Badaud F, Baechler J, Bagby L, Baldenegro Barrera C, Baldin B, Bandurin DV, Banerjee S, Barberis E, Baringer P, Barreto J, Bartlett JF, Bassler U, Bazterra V, Bean A, Begalli M, Bellantoni L, Berardi V, Beri SB, Bernardi G, Bernhard R, Berretti M, Bertram I, Besançon M, Beuselinck R, Bhat PC, Bhatia S, Bhatnagar V, Blazey G, Blessing S, Bloom K, Boehnlein A, Boline D, Boos EE, Borchsh V, Borissov G, Borysova M, Bossini E, Bottigli U, Bozzo M, Brandt A, Brandt O, Brochmann M, Brock R, Bross A, Brown D, Bu XB, Buehler M, Buescher V, Bunichev V, Burdin S, Burkhardt H, Buszello CP, Cafagna FS, Camacho-Pérez E, Carvalho W, Casey BCK, Castilla-Valdez H, Catanesi MG, Caughron S, Chakrabarti S, Chan KM, Chandra A, Chapon E, Chen G, Cho SW, Choi S, Choudhary B, Cihangir S, Claes D, Clutter J, Cooke M, Cooper WE, Corcoran M, Couderc F, Cousinou M-C, Csanád M, Csörgő T, Cuth J, Cutts D, da Motta H, Das A, Davies G, Deile M, de Jong SJ, De La Cruz-Burelo E, De Leonardis F, Déliot F, Demina R, Denisov D, Denisov SP, De Oliveira Martins C, Desai S, Deterre C, DeVaughan K, Diehl HT, Diesburg M, Ding PF, Dominguez A, Doubek M, Drutskoy A, Druzhkin D, Dubey A, Dudko LV, Duperrin A, Dutt S, Eads M, Edmunds D, Eggert K, Ellison J, Elvira VD, Enari Y, Eremin V, Evans H, Evdokimov A, Evdokimov VN, Fauré A, Feng L, Ferbel T, Ferro F, Fiedler F, Fiergolski A, Filthaut F, Fisher W, Fisk HE, Forthomme L, Fortner M, Fox H, Franc J, Fuess S, Garbincius PH, Garcia F, Garcia-Bellido A, García-González JA, Gavrilov V, Geng W, Georgiev V, Gerber CE, Gershtein Y, Giani S, Ginther G, Gogota O, Golovanov G, Grannis PD, Greder S, Greenlee H, Grenier G, Gris P, Grivaz J-F, Grohsjean A, Grünendahl S, Grünewald MW, Grzanka L, Guillemin T, Gutierrez G, Gutierrez P, Haley J, Hammerbaueret al., 2021, Odderon Exchange from Elastic Scattering Differences between pp and pp[over ¯] Data at 1.96 TeV and from pp Forward Scattering Measurements., Phys Rev Lett, Vol: 127

We describe an analysis comparing the pp[over ¯] elastic cross section as measured by the D0 Collaboration at a center-of-mass energy of 1.96 TeV to that in pp collisions as measured by the TOTEM Collaboration at 2.76, 7, 8, and 13 TeV using a model-independent approach. The TOTEM cross sections, extrapolated to a center-of-mass energy of sqrt[s]=1.96  TeV, are compared with the D0 measurement in the region of the diffractive minimum and the second maximum of the pp cross section. The two data sets disagree at the 3.4σ level and thus provide evidence for the t-channel exchange of a colorless, C-odd gluonic compound, also known as the odderon. We combine these results with a TOTEM analysis of the same C-odd exchange based on the total cross section and the ratio of the real to imaginary parts of the forward elastic strong interaction scattering amplitude in pp scattering for which the significance is between 3.4σ and 4.6σ. The combined significance is larger than 5σ and is interpreted as the first observation of the exchange of a colorless, C-odd gluonic compound.

Journal article

Abe K, Adrich P, Aihara H, Akutsu R, Alekseev I, Ali A, Ameli F, Anghel I, Anthony LH, Antonova M, Araya A, Asaoka Y, Ashida Y, Aushev V, Ballester F, Bandac I, Barbi M, Barker GJ, Barr G, Batkiewicz-Kwasniak M, Bellato M, Berardi V, Bergevin M, Bernard L, Bernardini E, Berns L, Bhadra S, Bian J, Blanchet A, Blaszczyk FDM, Blondel A, Boiano A, Bolognesi S, Bonavera L, Booth N, Borjabad S, Boschi T, Bose D, Bozza C, Bravar A, Bravo-Berguno D, Bronner C, Brown L, Bubak A, Buchowicz A, Avanzini MB, Cafagna FS, Calabria NF, Calvo-Mozota JM, Cao S, Cartwright SL, Carroll A, Catanesi MG, Cebrian S, Chabera M, Chakraborty S, Checchia C, Choi JH, Choubey S, Cicerchia M, Coleman J, Collazuol G, Cook L, Cowan G, Cuen-Rochin S, Danilov M, Daz Lopez G, De la Fuente E, de Perio P, De Rosa G, Dealtry T, Densham CJ, Dergacheva A, Deshmukh N, Devi MM, Di Lodovico F, Di Meo P, Di Palma I, Doyle TA, Drakopoulou E, Drapier O, Dumarchez J, Dunne P, Dziewiecki M, Eklund L, El Hedri S, Ellis J, Emery S, Esmaili A, Esteve R, Evangelisti A, Feely M, Fedotov S, Feng J, Fernandez P, Fernandez-Martinez E, Ferrario P, Ferrazzi B, Feusels T, Finch A, Finley C, Fiorentini A, Fiorillo G, Fitton M, Frankiewicz K, Friend M, Fujii Y, Fukuda Y, Galinski G, Gao J, Garde C, Garfagnini A, Garode S, Gialanella L, Giganti C, Gomez-Cadenas JJ, Gonin M, Gonzalez-Nuevo J, Gorin A, Gornea R, Gousy-Leblanc V, Gramegna F, Grassi M, Grella G, Guigue M, Gumplinger P, Hadley DR, Harada M, Hartfiel B, Hartz M, Hassani S, Hastings NC, Hayato Y, Hernando-Morata JA, Herrero V, Hill J, Hiraide K, Hirota S, Holin A, Horiuchi S, Hoshina K, Hultqvist K, Iacob F, Ichikawa AK, Ibnsalih WI, Iijima T, Ikeda M, Inomoto M, Inoue K, Insler J, Ioannisian A, Ishida T, Ishidoshiro K, Ishino H, Ishitsuka M, Ito H, Ito S, Itow Y, Iwamoto K, Izmaylov A, Izumi N, Izumiyama S, Jakkapu M, Jamieson B, Jang H, Jang JS, Jenkins SJ, Jeon SH, Jiang M, Jo HS, Jonsson P, Joo KK, Kajita T, Kakuno H, Kameda J, Kano Y, Kalaczynski P, Karlen D, Kaset al., 2021, Supernova Model Discrimination with Hyper-Kamiokande, ASTROPHYSICAL JOURNAL, Vol: 916, ISSN: 0004-637X

Journal article

Abe K, Akhlaq N, Akutsu R, Ali A, Alt C, Andreopoulos C, Antonova M, Aoki S, Arihara T, Asada Y, Ashida Y, Atkin ET, Awataguchi Y, Barker GJ, Barr G, Barrow D, Batkiewicz-Kwasniak M, Beloshapkin A, Bench F, Berardi V, Berns L, Bhadra S, Blanchet A, Blondel A, Bolognesi S, Bonus T, Bourguille B, Boyd SB, Bravar A, Bravo Berguño D, Bronner C, Bron S, Bubak A, Buizza Avanzini M, Cao S, Cartwright SL, Catanesi MG, Cervera A, Chakrani J, Cherdack D, Christodoulou G, Cicerchia M, Coleman J, Collazuol G, Cook L, Coplowe D, Cudd A, De Rosa G, Dealtry T, Delogu CC, Dennis SR, Densham C, Dergacheva A, Di Lodovico F, Dolan S, Douqa D, Doyle TA, Dumarchez J, Dunne P, Eguchi A, Eklund L, Emery-Schrenk S, Ereditato A, Finch AJ, Fiorillo G, Francois C, Friend M, Fujii Y, Fukuda R, Fukuda Y, Fusshoeller K, Giganti C, Gonin M, Goodman EAG, Gorin A, Grassi M, Guigue M, Hadley DR, Hamacher-Baumann P, Harris DA, Hartz M, Hasegawa T, Hassani S, Hastings NC, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Hong Van NT, Honjo T, Iacob F, Ichikawa AK, Ikeda M, Ishida T, Ishitsuka M, Iwamoto K, Izmaylov A, Izumi N, Jakkapu M, Jamieson B, Jenkins SJ, Jesús-Valls C, Jiang JJ, Jonsson P, Jung CK, Jurj PB, Kabirnezhad M, Kakuno H, Kameda J, Kasetti SP, Kataoka Y, Katayama Y, Katori T, Kearns E, Khabibullin M, Khotjantsev A, Kikawa T, Kikutani H, King S, Kisiel J, Kobata T, Kobayashi T, Koch L, Konaka A, Kormos LL, Koshio Y, Kostin A, Kowalik K, Kudenko Y, Kuribayashi S, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamoureux M, Last D, Laveder M, Lawe M, Lin S-K, Litchfield RP, Liu SL, Longhin A, Ludovici L, Lu X, Lux T, Machado LN, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Marti-Magro L, Maruyama T, Matsubara T, Matsushita K, Mauger C, Maurel A, Mavrokoridis K, Mazzucato E, McCauley N, McElwee J, McFarland KS, McGrew C, Mefodiev A, Megias GD, Mellet L, Mezzetto M, Minamino A, Mineev O, Mine S, Miura M, Molina Bueno L, Moriyama S, Mueller TA, Munford D, Munteanu L, Nagai Y, Nakadet al., 2021, Improved constraints on neutrino mixing from the T2K experiment with 3.13×1021 protons on target, Physical Review D, Vol: 103, Pages: 1-59, ISSN: 2470-0010

The T2K experiment reports updated measurements of neutrino and antineutrino oscillations using both appearance and disappearance channels. This result comes from an exposure of 14.9(16.4)×1020 protons on target in neutrino (antineutrino) mode. Significant improvements have been made to the neutrino interaction model and far detector reconstruction. An extensive set of simulated data studies have also been performed to quantify the effect interaction model uncertainties have on the T2K oscillation parameter sensitivity. T2K performs multiple oscillation analyses that present both frequentist and Bayesian intervals for the Pontecorvo-Maki-Nakagawa-Sakata parameters. For fits including a constraint on sin2θ13 from reactor data and assuming normal mass ordering T2K measures sin2θ23=0.53+0.03−0.04 and Δm232=(2.45±0.07)×10−3  eV2 c−4. The Bayesian analyses show a weak preference for normal mass ordering (89% posterior probability) and the upper sin2θ23 octant (80% posterior probability), with a uniform prior probability assumed in both cases. The T2K data exclude CP conservation in neutrino oscillations at the 2σ level.

Journal article

Abe K, Akhlaq N, Akutsu R, Ali A, Alt C, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Arihara T, Asada Y, Ashida Y, Atkin ET, Awataguchi Y, Ban S, Barbi M, Barker GJ, Barr G, Barrow D, Barry C, Batkiewicz-Kwasniak M, Beloshapkin A, Bench F, Berardi V, Berkman S, Berns L, Bhadra S, Bienstock S, Blanchet A, Blondel A, Bolognesi S, Bonus T, Bourguille B, Boyd SB, Brailsford D, Bravar A, Berguno DB, Bronner C, Bron S, Bubak A, Avanzini MB, Calcutt J, Campbell T, Cao S, Cartwright SL, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Cicerchia M, Coleman J, Collazuol G, Cook L, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Dergacheva A, Di Lodovico F, Dokania N, Dolan S, Doyle TA, Drapier O, Dumarchez J, Dunne P, Eguchi A, Eklund L, Emery-Schrenk S, Ereditato A, Fernandez P, Feusels T, Finch AJ, Fiorentini GA, Fiorillo G, Francois C, Friend M, Fujii Y, Fujita R, Fukuda D, Fukuda R, Fukuda Y, Fusshoeller K, Gameil K, Giganti C, Golan T, Gonin M, Gorin A, Guigue M, Hadley DR, Haigh JT, Hamacher-Baumann P, Harris DA, Hartz M, Hasegawa T, Hassani S, Hastings NC, Hayashino T, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Van NTH, Honjo T, Iacob F, Ichikawa AK, Ikeda M, Ishida T, Ishii T, Ishitsuka M, Iwamoto K, Izmaylov A, Izumi N, Jakkapu M, Jamieson B, Jenkins SJ, Jesus-Valls C, Jiang M, Johnson S, Jonsson P, Jung CK, Jurj PB, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Kasetti SP, Kataoka Y, Katayama Y, Katori T, Kato Y, Kearns E, Khabibullin M, Khotjantsev A, Kikawa T, Kikutani H, Kim H, Kim J, King S, Kisiel J, Knight A, Knox A, Kobata T, Kobayashi T, Koch L, Koga T, Konaka A, Kormos LL, Koshio Y, Kostin A, Kowalik K, Kubo H, Kudenko Y, Kukita N, Kuribayashi S, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamoureux M, Last D, Laveder M, Lawe M, Licciardi M, Lindner T, Litchfield RP, Liu SL, Li X, Longhin A, Ludovici L, Lu X, Lux T, Machado LN, Magaletti L, Maet al., 2021, Measurements of (nu)over-bar(mu) and (nu)over-bar(mu) + nu(mu) charged-current cross-sections without detected pions or protons on water and hydrocarbon at a mean anti-neutrino energy of 0.86 GeV, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, Vol: 2021, ISSN: 2050-3911

Journal article

Abe K, Akhlaq N, Akutsu R, Ali A, Alt C, Andreopoulos C, Antonova M, Aoki S, Arihara T, Asada Y, Ashida Y, Atkin ET, Awataguchi Y, Barker GJ, Barr G, Barrow D, Batkiewicz-Kwasniak M, Beloshapkin A, Bench F, Berardi V, Berns L, Bhadra S, Blondel A, Bolognesi S, Bonus T, Bourguille B, Boyd SB, Bravar A, Berguno DB, Bronner C, Bron S, Bubak A, Avanzini MB, Cao S, Cartwright SL, Catanesi MG, Cervera A, Cherdack D, Christodoulou G, Cicerchia M, Coleman J, Collazuol G, Cook L, Coplowe D, Cudd A, De Rosa G, Dealtry T, Delogu CC, Dennis SR, Densham C, Dergacheva A, Di Lodovico F, Dolan S, Doyle TA, Dumarchez J, Dunne P, Eguchi A, Eklund L, Emery-Schrenk S, Ereditato A, Finch AJ, Fiorentini GA, Francois C, Friend M, Fujii Y, Fukuda R, Fukuda Y, Fusshoeller K, Giganti C, Gonin M, Gorin A, Guigue M, Hadley DR, Hamacher-Baumann P, Hartz M, Hasegawa T, Hassani S, Hastings NC, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Van NTH, Honjo T, Iacob F, Ichikawa AK, Ikeda M, Ishida T, Ishitsuka M, Iwamoto K, Izmaylov A, Izumi N, Jakkapu M, Jamieson B, Jenkins SJ, Jesus-Valls C, Jonsson P, Jung CK, Jurj PB, Kabirnezhad M, Kakuno H, Kameda J, Kasetti SP, Kataoka Y, Katayama Y, Katori T, Kearns E, Khabibullin M, Khotjantsev A, Kikawa T, Kikutani H, King S, Kisiel J, Kobata T, Kobayashi T, Koch L, Konaka A, Kormos LL, Koshio Y, Kostin A, Kowalik K, Kudenko Y, Kuribayashi S, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamoureux M, Last D, Laveder M, Lawe M, Litchfield RP, Liu SL, Longhin A, Ludovici L, Lu X, Lux T, Machado LN, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Marti-Magro L, Maruyama T, Matsubara T, Matsushita K, Mauger C, Mavrokoridis K, Mazzucato E, McCauley N, McElwee J, McFarland KS, McGrew C, Mefodiev A, Mezzetto M, Minamino A, Mineev O, Mine S, Miura M, Bueno LM, Moriyama S, Mueller TA, Munteanu L, Nagai Y, Nakadaira T, Nakahata M, Nakajima Y, Nakamura A, Nakamura K, Nakano Y, Nakayama S, Nakaya T, Nakayoshi K, Naseby CER, Ngoc T, Nguyen VQ, Niewczas K, Niet al., 2021, T2K measurements of muon neutrino and antineutrino disappearance using 3.13 x 10(21) protons on target, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 103, Pages: 1-9, ISSN: 1550-2368

We report measurements by the T2K experiment of the parameters θ23 and Δm232, which govern the disappearance of muon neutrinos and antineutrinos in the three-flavor PMNS neutrino oscillation model at T2K’s neutrino energy and propagation distance. Utilizing the ability of the experiment to run with either a mainly neutrino or a mainly antineutrino beam, muon-like events from each beam mode are used to measure these parameters separately for neutrino and antineutrino oscillations. Data taken from 1.49×1021 protons on target (POT) in neutrino mode and 1.64×1021 POT in antineutrino mode are used. The best-fit values obtained by T2K were sin2(θ23)=0.51+0.06−0.07(0.43+0.21−0.05) and Δm232=2.47+0.08−0.09(2.50+0.18−0.13)×10−3  eV2/c4 for neutrinos (antineutrinos). No significant differences between the values of the parameters describing the disappearance of muon neutrinos and antineutrinos were observed. An analysis using an effective two-flavor neutrino oscillation model where the sine of the mixing angle is allowed to take nonphysical values larger than 1 is also performed to check the consistency of our data with the three-flavor model. Our data were found to be consistent with a physical value for the mixing angle.

Journal article

Abazov VM, Abbott B, Acharya BS, Adams M, Adams T, Agnew JP, Alexeev GD, Alkhazov G, Alton A, Askew A, Atkins S, Augsten K, Aushev V, Aushev Y, Avila C, Badaud F, Bagby L, Baldin B, Bandurin D, Banerjee S, Barberis E, Baringer P, Bartlett JF, Bassler U, Bazterra V, Bean A, Begalli M, Bellantoni L, Beri SB, Bernardi G, Bernhard R, Bertram I, Besancon M, Beuselinck R, Bhat PC, Bhatia S, Bhatnagar V, Blazey G, Blessing S, Bloom K, Boehnlein A, Boline D, Boos EE, Borissov G, Borysova M, Brandt A, Brandt O, Brochmann M, Brock R, Bross A, Brown D, Bu XB, Buehler M, Buescher V, Bunichev V, Burdin S, Buszello CP, Camacho-Perez E, Casey BCK, Castilla-Valdez H, Caughron S, Chakrabarti S, Chan KM, Chandra A, Chapon E, Chen G, Cho SW, Choi S, Choudhary B, Cihangir S, Claes D, Clutter J, Cooke M, Cooper WE, Corcoran M, Couderc F, Cousinou M-C, Cuth J, Cutts D, Das A, Davies G, de Jong SJ, De La Cruz-Burelo E, Deliot F, Demina R, Denisov D, Denisov SP, Desai S, Deterre C, DeVaughan K, Diehl HT, Diesburg M, Ding PF, Dominguez A, Drutskoy A, Dubey A, Dudko L, Duperrin A, Dutt S, Eads M, Edmunds D, Ellison J, Elvira VD, Enari Y, Evans H, Evdokimov A, Evdokimov VN, Faure A, Feng L, Ferbel T, Fiedler F, Filthaut F, Fisher W, Fisk HE, Fortner M, Fox H, Franc J, Fuess S, Garbincius PH, Garcia-Bellido A, Garcia-Gonzalez JA, Gavrilov V, Geng W, Gerber CE, Gershtein Y, Ginther G, Gogota O, Golovanov G, Grannis PD, Greder S, Greenlee H, Grenier G, Gris P, Grivaz J-F, Grohsjean A, Grunendahl S, Grunewald MW, Guillemin T, Gutierrez G, Gutierrez P, Haley J, Han L, Harder K, Harel A, Hauptman JM, Hays J, Head T, Hebbeker T, Hedin D, Hegab H, Heinson AP, Heintz U, Hensel C, Heredia-De La Cruz I, Herner K, Hesketh G, Hildreth MD, Hirosky R, Hoang T, Hobbs JD, Hoeneisen B, Hogan J, Hohlfeld M, Holzbauer JL, Howley I, Hubacek Z, Hynek V, Iashvili I, Ilchenko Y, Illingworth R, Ito AS, Jabeen S, Jaffre M, Jayasinghe A, Jeong MS, Jesik R, Jiang P, Johns K, Johnson E, Johnson M, Jonckheere A, Jonsson Pet al., 2020, Studies of X(3872) and psi(2S) production in p(p)over-bar collisions at 1.96 TeV, PHYSICAL REVIEW D, Vol: 102, ISSN: 2470-0010

Journal article

Abe K, Akhlaq N, Akutsu R, Ali A, Alt C, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Arihara T, Asada Y, Ashida Y, Atkin ET, Awataguchi Y, Ban S, Barbi M, Barker GJ, Barr G, Barrow D, Barry C, Batkiewicz-Kwasniak M, Beloshapkin A, Bench F, Berardi V, Berns L, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bonus T, Bourguille B, Boyd SB, Brailsford D, Bravar A, Bravo Berguño D, Bronner C, Bron S, Bubak A, Buizza Avanzini M, Calcutt J, Campbell T, Cao S, Cartwright SL, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Cicerchia M, Coleman J, Collazuol G, Cook L, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Di Lodovico F, Dokania N, Dolan S, Doyle TA, Drapier O, Dumarchez J, Dunne P, Eguchi A, Eklund L, Emery-Schrenk S, Ereditato A, Fernandez P, Feusels T, Finch AJ, Fiorentini GA, Fiorillo G, Francois C, Friend M, Fujii Y, Fujita R, Fukuda D, Fukuda R, Fukuda Y, Fusshoeller K, Giganti C, Golan T, Gonin M, Gorin A, Guigue M, Hadley DR, Haigh JT, Hamacher-Baumann P, Hartz M, Hasegawa T, Hassani S, Hastings NC, Hayashino T, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Hong Van NT, Honjo T, Iacob F, Ichikawa AK, Ikeda M, Ishida T, Ishii T, Ishitsuka M, Iwamoto K, Izmaylov A, Izumi N, Jakkapu M, Jamieson B, Jenkins SJ, Jesús-Valls C, Jiang M, Johnson S, Jonsson P, Jung CK, Junjie X, Jurj PB, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Kasetti SP, Kataoka Y, Katayama Y, Katori T, Kato Y, Kearns E, Khabibullin M, Khotjantsev A, Kikawa T, Kikutani H, Kim H, King S, Kisiel J, Knight A, Knox A, Kobata T, Kobayashi T, Koch L, Koga T, Konaka A, Kormos LL, Koshio Y, Kostin A, Kowalik K, Kubo H, Kudenko Y, Kukita N, Kuribayashi S, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamoureux M, Last D, Laveder M, Lawe M, Licciardi M, Lindner T, Litchfield RP, Liu SL, Li X, Longhin A, Ludovici L, Lu X, Lux T, Machado LN, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marinoet al., 2020, Measurement of the charged-current electron (anti-)neutrino inclusive cross-sections at the T2K off-axis near detector ND280, The Journal of High Energy Physics, Vol: 2020, Pages: 1-43, ISSN: 1029-8479

The electron (anti-)neutrino component of the T2K neutrino beam constitutes the largest background in the measurement of electron (anti-)neutrino appearance at the far detector. The electron neutrino scattering is measured directly with the T2K off-axis near detector, ND280. The selection of the electron (anti-)neutrino events in the plastic scintillator target from both neutrino and anti-neutrino mode beams is discussed in this paper. The flux integrated single differential charged-current inclusive electron (anti-)neutrino cross-sections, dσ/dp and dσ/d cos(θ), and the total cross-sections in a limited phase-space in momentum and scattering angle (p > 300 MeV/c and θ ≤ 45°) are measured using a binned maximum likelihood fit and compared to the neutrino Monte Carlo generator predictions, resulting in good agreement.

Journal article

Abe K, Akutsu R, Ali A, Alt C, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Ashida Y, Atkin ET, Awataguchi Y, Ban S, Barbi M, Barker GJ, Barr G, Barry C, Batkiewicz-Kwasniak M, Beloshapkin A, Bench F, Berardi V, Berkman S, Berns L, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bourguille B, Boyd SB, Brailsford D, Bravar A, Bronner C, Avanzini MB, Calcutt J, Campbell T, Cao S, Cartwright SL, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Coleman J, Collazuol G, Cook L, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Di Lodovico F, Dokania N, Dolan S, Drapier O, Dumarchez J, Dunne P, Eklund L, Emery-Schrenk S, Ereditato A, Fernandez P, Feusels T, Finch AJ, Fiorentini GA, Fiorillo G, Francois C, Friend M, Fujii Y, Fujita R, Fukuda D, Fukuda R, Fukuda Y, Gameil K, Giganti C, Golan T, Gonin M, Gorin A, Guigue M, Hadley DR, Haigh JT, Hamacher-Baumann P, Hartz M, Hasegawa T, Hastings NC, Hayashino T, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Hong Van NT, Iacob F, Ichikawa AK, Ikeda M, Ishida T, Ishii T, Ishitsuka M, Iwamoto K, Izmaylov A, Jamieson B, Jenkins SJ, Jesus-Valls C, Jiang M, Johnson S, Jonsson P, Jung CK, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Kataoka Y, Katori T, Kato Y, Kearns E, Khabibullin M, Khotjantsev A, Kim H, Kim J, King S, Kisiel J, Knight A, Knox A, Kobayashi T, Koch L, Koga T, Konaka A, Kormos LL, Koshio Y, Kowalik K, Kubo H, Kudenko Y, Kukita N, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamoureux M, Laveder M, Lawe M, Licciardi M, Lindner T, Litchfield RP, Liu SL, Li X, Longhin A, Ludovici L, Lu X, Lux T, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Martin JF, Maruyama T, Matsubara T, Matsushita K, Matveev V, Mavrokoridis K, Mazzucato E, McCarthy M, McCauley N, McFarland KS, McGrew C, Mefodiev A, Metelko C, Mezzetto M, Minamino A, Mineev O, Mine S, Miura M, Bueno LM, Moriyama S, Morrison J, Mueller TA, Munteanet al., 2020, First measurement of the charged current (nu)over-bar(mu) double differential cross section on a water target without( )pions in the final state, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 102, Pages: 1-16, ISSN: 1550-2368

This paper reports the first differential measurement of the charged-current ¯νμ interaction cross section on water with no pions in the final state. The unfolded flux-averaged measurement using the T2K off-axis near detector is given in double-differential bins of μ+ momentum and angle. The integrated cross section in a restricted phase space is σ=(1.11±0.18)×10−38  cm2 per water molecule. Comparisons with several nuclear models are also presented.

Journal article

Abe K, Akhlaq N, Akutsu R, Ali A, Alt C, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Arihara T, Asada Y, Ashida Y, Atkin ET, Awataguchi Y, Ban S, Barbi M, Barker GJ, Barr G, Barrow D, Batkiewicz-Kwasniak M, Beloshapkin A, Bench F, Berardi V, Berns L, Bhadra S, Bienstock S, Bolognesi S, Bonus T, Bourguille B, Boyd SB, Bravar A, Bravo Berguno D, Bronner C, Bron S, Bubak A, Avanzini MB, Campbell T, Cao S, Cartwright SL, Catanesi MG, Cervera A, Cherdack D, Chikuma N, Christodoulou G, Cicerchia M, Coleman J, Collazuol G, Cook L, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Dennis SR, Densham C, Di Lodovico F, Dokania N, Dolan S, Doyle TA, Drapier O, Dumarchez J, Dunne P, Eguchi A, Eklund L, Emery-Schrenk S, Ereditato A, Finch AJ, Fiorillo G, Francois C, Friend M, Fujii Y, Fujita R, Fukuda D, Fukuda R, Fukuda Y, Fusshoeller K, Giganti C, Gonin M, Gorin A, Guigue M, Hadley DR, Haigh JT, Hamacher-Baumann P, Hartz M, Hasegawa T, Hassani S, Hastings NC, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Van NTH, Honjo T, Iacob F, Ichikawa AK, Ikeda M, Ishida T, Ishitsuka M, Iwamoto K, Izmaylov A, Izumi N, Jakkapu M, Jamieson B, Jenkins SJ, Jesus-Valls C, Jiang M, Jonsson P, Jung CK, Junjie X, Jurj PB, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Kasetti SP, Kataoka Y, Katayama Y, Katori T, Kato Y, Kearns E, Khabibullin M, Khotjantsev A, Kikawa T, Kikutani H, Kim H, King S, Kisiel J, Knight A, Kobata T, Kobayashi T, Koch L, Koga T, Konaka A, Kormos LL, Koshio Y, Kostin A, Kowalik K, Kubo H, Kudenko Y, Kukita N, Kuribayashi S, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamoureux M, Last D, Lawe M, Licciardi M, Litchfield RP, Liu SL, Li X, Longhin A, Ludovici L, Lu X, Lux T, Machado LN, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Marti-Magro L, Maruyama T, Matsubara T, Matsushita K, Matveev V, Mauger C, Mavrokoridis K, Mazzucato E, McCauley N, McElwee J, McFarland KS, McGrew C, Mefodiev A, Metelko C, Mezzetto M, Minamino Aet al., 2020, Simultaneous measurement of the muon neutrino charged-current cross section on oxygen and carbon without pions in the final state at T2K, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 101, Pages: 112004 – 1-112004 – 32, ISSN: 1550-2368

This paper reports the first simultaneous measurement of the double differential muon neutrino charged-current cross section on oxygen and carbon without pions in the final state as a function of the outgoing muon kinematics, made at the ND280 off-axis near detector of the T2K experiment. The ratio of the oxygen and carbon cross sections is also provided to help validate various models’ ability to extrapolate between carbon and oxygen nuclear targets, as is required in T2K oscillation analyses. The data are taken using a neutrino beam with an energy spectrum peaked at 0.6 GeV. The extracted measurement is compared with the prediction from different Monte Carlo neutrino-nucleus interaction event generators, showing particular model separation for very forward-going muons. Overall, of the models tested, the result is best described using local Fermi gas descriptions of the nuclear ground state with RPA suppression.

Journal article

Abe K, Akhlaq N, Akutsu R, Ali A, Alt C, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Arihara T, Asada Y, Ashida Y, Atkin ET, Awataguchi Y, Ban S, Barbi M, Barker GJ, Barr G, Barrow D, Barry C, Batkiewicz-Kwasniak M, Beloshapkin A, Bench F, Berardi V, Berns L, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bonus T, Bourguille B, Boyd SB, Brailsford D, Bravar A, Bravo Berguno D, Bronner C, Bron S, Bubak A, Avanzini MB, Calcutt J, Campbell T, Cao S, Cartwright SL, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Cicerchia M, Coleman J, Collazuol G, Cook L, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Di Lodovico F, Dokania N, Dolan S, Doyle TA, Drapier O, Dumarchez J, Dunne P, Eguchi A, Eklund L, Emery-Schrenk S, Ereditato A, Fernandez P, Feusels T, Finch AJ, Fiorentini GA, Fiorillo G, Francois C, Friend M, Fujii Y, Fujita R, Fukuda D, Fukuda R, Fukuda Y, Fusshoeller K, Giganti C, Golan T, Gonin M, Gorin A, Guigue M, Hadley DR, Haigh JT, Hamacher-Baumann P, Hartz M, Hasegawa T, Hassani S, Hastings NC, Hayashino T, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Van NTH, Honjo T, Iacob F, Ichikawa AK, Ikeda M, Ishida T, Ishii T, Ishitsuka M, Iwamoto K, Izmaylov A, Izumi N, Jakkapu M, Jamieson B, Jenkins SJ, Jesus-Valls C, Jiang M, Johnson S, Jonsson P, Jung CK, Junjie X, Jurj PB, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Kasetti SP, Kataoka Y, Katayama Y, Katori T, Kato Y, Kearns E, Khabibullin M, Khotjantsev A, Kikawa T, Kikutani H, Kim H, King S, Kisiel J, Knight A, Knox A, Kobata T, Kobayashi T, Koch L, Koga T, Konaka A, Kormos LL, Koshio Y, Kostin A, Kowalik K, Kubo H, Kudenko Y, Kukita N, Kuribayashi S, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamoureux M, Last D, Laveder M, Lawe M, Licciardi M, Lindner T, Litchfield RP, Liu SL, Li X, Longhin A, Ludovici L, Lu X, Lux T, Machado LN, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Marti-et al., 2020, First combined measurement of the muon neutrino and antineutrino charged-current cross section without pions in the final state at T2K, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 101, Pages: 112001 – 1-112001 – 44, ISSN: 1550-2368

This paper presents the first combined measurement of the double-differential muon neutrino and antineutrino charged-current cross sections with no pions in the final state on hydrocarbon at the off-axis near detector of the T2K experiment. The data analyzed in this work comprise 5.8×1020 and 6.3×1020 protons on target in neutrino and antineutrino mode respectively, at a beam energy peak of 0.6 GeV. Using the two measured cross sections, the sum, difference, and asymmetry were calculated with the aim of better understanding the nuclear effects involved in such interactions. The extracted measurements have been compared with the prediction from different Monte Carlo generators and theoretical models showing that the difference between the two cross sections have interesting sensitivity to nuclear effects.

Journal article

Abe K, Akutsu R, Ali A, Alt C, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Asada Y, Ashida Y, Atkin ET, Awataguchi Y, Ban S, Barbi M, Barker GJ, Barr G, Barrow D, Barry C, Batkiewicz-Kwasniak M, Beloshapkin A, Bench F, Berardi V, Berkman S, Berns L, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bourguille B, Boyd SB, Brailsford D, Bravar A, Bravo Berguno D, Bronner C, Bubak A, Avanzini MB, Calcutt J, Campbell T, Cao S, Cartwright SL, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Coleman J, Collazuol G, Cook L, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Di Lodovico F, Dokania N, Dolan S, Doyle TA, Drapier O, Dumarchez J, Dunne P, Eklund L, Emery-Schrenk S, Ereditato A, Fernandez P, Feusels T, Finch AJ, Fiorentini GA, Fiorillo G, Francois C, Friend M, Fujii Y, Fujita R, Fukuda D, Fukuda R, Fukuda Y, Fusshoeller K, Gameil K, Giganti C, Golan T, Gonin M, Gorin A, Guigue M, Hadley DR, Haigh JT, Hamacher-Baumann P, Hartz M, Hasegawa T, Hastings NC, Hayashino T, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Van NTH, Iacob F, Ichikawa AK, Ikeda M, Ishida T, Ishii T, Ishitsuka M, Iwamoto K, Izmaylov A, Jakkapu M, Jamieson B, Jenkins SJ, Jesus-Valls C, Jiang M, Johnson S, Jonsson P, Jung CK, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Kasetti SP, Kataoka Y, Katori T, Kato Y, Kearns E, Khabibullin M, Khotjantsev A, Kikawa T, Kim H, Kim J, King S, Kisiel J, Knight A, Knox A, Kobayashi T, Koch L, Koga T, Konaka A, Kormos LL, Koshio Y, Kostin A, Kowalik K, Kubo H, Kudenko Y, Kukita N, Kuribayashi S, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamoureux M, Laveder M, Lawe M, Licciardi M, Lindner T, Litcheld RP, Liu SL, Li X, Longhin A, Ludovici L, Lu X, Lux T, Machado LN, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Marti-Magro L, Martin JF, Maruyama T, Matsubara T, Matsushita K, Matveev V, Mavrokoridis K, Mazzucato E, McCarthy M, McCauley N, Mcet al., 2020, Search for electron antineutrino appearance in a long-baseline muon antineutrino beam, Physical Review Letters, Vol: 124, Pages: 161802-1-161802-8, ISSN: 0031-9007

Electron antineutrino appearance is measured by the T2K experiment in an accelerator-produced antineutrino beam, using additional neutrino beam operation to constrain parameters of the Pontecorvo-Maki-Nakagawa-Sakata (PMNS) mixing matrix. T2K observes 15 candidate electron antineutrino events with a background expectation of 9.3 events. Including information from the kinematic distribution of observed events, the hypothesis of no electron antineutrino appearance is disfavored with a significance of 2.40σ and no discrepancy between data and PMNS predictions is found. A complementary analysis that introduces an additional free parameter which allows non-PMNS values of electron neutrino and antineutrino appearance also finds no discrepancy between data and PMNS predictions.

Journal article

Abe K, Akutsu R, Ali A, Alt C, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Ashida Y, Atkin ET, Awataguchi Y, Ban S, Barbi M, Barker GJ, Barr G, Barry C, Batkiewicz-Kwasniak M, Beloshapkin A, Bench F, Berardi V, Berkman S, Berns L, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bourguille B, Boyd SB, Brailsford D, Bravar A, Berguno DB, Bronner C, Bubak A, Avanzini MB, Calcutt J, Campbell T, Cao S, Cartwright SL, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Coleman J, Collazuol G, Cook L, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Di Lodovico F, Dokania N, Dolan S, Drapier O, Dumarchez J, Dunne P, Eklund L, Emery-Schrenk S, Ereditato A, Fernandez P, Feusels T, Finch AJ, Fiorentini GA, Fiorillo G, Francois C, Friend M, Fujii Y, Fujita R, Fukuda D, Fukuda R, Fukuda Y, Gameil K, Giganti C, Golan T, Gonin M, Gorin A, Guigue M, Hadley DR, Haigh JT, Hamacher-Baumann P, Hartz M, Hasegawa T, Hastings NC, Hayashino T, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Hong Van NT, Iacob F, Ichikawa AK, Ikeda M, Ishida T, Ishii T, Ishitsuka M, Iwamoto K, Izmaylov A, Jamieson B, Jenkins SJ, Jesus-Valls C, Jiang M, Johnson S, Jonsson P, Jung CK, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Kasetti SP, Kataoka Y, Katori T, Kato Y, Kearns E, Khabibullin M, Khotjantsev A, Kikawa T, Kim H, Kim J, King S, Kisiel J, Knight A, Knox A, Kobayashi T, Koch L, Koga T, Konaka A, Kormos LL, Koshio Y, Kowalik K, Kubo H, Kudenko Y, Kukita N, Kuribayashi S, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamoureux M, Laveder M, Lawe M, Licciardi M, Lindner T, Litchfield RP, Liu SL, Li X, Longhin A, Ludovici L, Lu X, Lux T, Machado LN, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Martin JF, Maruyama T, Matsubara T, Matsushita K, Matveev V, Mavrokoridis K, Mazzucato E, McCarthy M, McCauley N, McFarland KS, McGrew C, Mefodiev A, Metelko C, Mezzetto M, Minamino A, Mineev Oet al., 2020, Constraint on the matter-antimatter symmetry-violating phase in neutrino oscillations, Nature, Vol: 580, Pages: 339-344, ISSN: 0028-0836

The charge-conjugation and parity-reversal (CP) symmetry of fundamental particles is a symmetry between matter and antimatter. Violation of this CP symmetry was first observed in 19641, and CP violation in the weak interactions of quarks was soon established2. Sakharov proposed3 that CP violation is necessary to explain the observed imbalance of matter and antimatter abundance in the Universe. However, CP violation in quarks is too small to support this explanation. So far, CP violation has not been observed in non-quark elementary particle systems. It has been shown that CP violation in leptons could generate the matter–antimatter disparity through a process called leptogenesis4. Leptonic mixing, which appears in the standard model’s charged current interactions5,6, provides a potential source of CP violation through a complex phase δCP, which is required by some theoretical models of leptogenesis7,8,9. This CP violation can be measured in muon neutrino to electron neutrino oscillations and the corresponding antineutrino oscillations, which are experimentally accessible using accelerator-produced beams as established by the Tokai-to-Kamioka (T2K) and NOvA experiments10,11. Until now, the value of δCP has not been substantially constrained by neutrino oscillation experiments. Here we report a measurement using long-baseline neutrino and antineutrino oscillations observed by the T2K experiment that shows a large increase in the neutrino oscillation probability, excluding values of δCP that result in a large increase in the observed antineutrino oscillation probability at three standard deviations (3σ). The 3σ confidence interval for δCP, which is cyclic and repeats every 2π, is [−3.41, −0.03] for the so-called normal mass ordering and [−2.54, −0.32] for the inverted mass ordering. Our results indicate CP violation in leptons and our method enables sensitive searches for matter–antimatter

Journal article

Abramishvili R, Adamov G, Akhmetshin RR, Allin A, Angelique JC, Anishchik V, Aoki M, Aznabayev D, Bagaturia I, Ban G, Ban Y, Bauer D, Baygarashev D, Bondar AE, Carloganu C, Carniol B, Chau TT, Chen JK, Chen SJ, Cheung YE, da Silva W, Dauncey PD, Densham C, Devidze G, Dornan P, Drutskoy A, Duginov V, Eguchi Y, Epshteyn LB, Evtoukhovitch P, Fayer S, Fedotovich GV, Finger M, Finger M, Fujii Y, Fukao Y, Gabriel JL, Gay P, Gillies E, Grigoriev DN, Gritsay K, Hai VH, Hamada E, Hashim IH, Hashimoto S, Hayashi O, Hayashi T, Hiasa T, Ibrahim ZA, Igarashi Y, Ignatov FV, Iio M, Ishibashi K, Issadykov A, Itahashi T, Jansen A, Jiang XS, Jonsson P, Kachelhoffer T, Kalinnikov V, Kaneva E, Kapusta F, Katayama H, Kawagoe K, Kawashima R, Kazak N, Kazanin VF, Kemularia O, Khvedelidze A, Koike M, Kormoll T, Kozlov GA, Kozyrev AN, Kravchenko M, Krikler B, Kumsiashvili G, Kuno Y, Kuriyama Y, Kurochkin Y, Kurup A, Lagrange B, Lai J, Lee MJ, Li HB, Litchfield RP, Li WG, Loan T, Lomidze D, Lomidze I, Loveridge P, Macharashvili G, Makida Y, Mao YJ, Markin O, Matsuda Y, Melkadze A, Melnik A, Mibe T, Mihara S, Miyamoto N, Miyazaki Y, Idris FM, Azmi KAMK, Moiseenko A, Moritsu M, Mori Y, Motoishi T, Nakai H, Nakai Y, Nakamoto T, Nakamura Y, Nakatsugawa Y, Nakazawa Y, Nash J, Natori H, Niess V, Nioradze M, Nishiguchi H, Noguchi K, Numao T, O'Dell J, Ogitsu T, Ohta S, Oishi K, Okamoto K, Okamura T, Okinaka K, Omori C, Ota T, Pasternak J, Paulau A, Picters D, Ponariadov V, Quemener G, Ruban AA, Rusinov V, Sabirov B, Sakamoto H, Sarin P, Sasaki K, Sato A, Sato J, Semertzidis YK, Shigyo N, Shoukavy D, Slunecka M, Stoeckinger D, Sugano M, Tachimoto T, Takayanagi T, Tanaka M, Tang J, Tao CV, Teixeira AM, Tevzadze Y, Thanh T, Tojo J, Tolmachev SS, Tomasek M, Tomizawa M, Toriashvili T, Trang H, Trekov I, Tsamalaidze Z, Tsverava N, Uchida T, Uchida Y, Ueno K, Velicheva E, Volkov A, Vrba V, Abdullah WATW, Warin-Charpentier P, Wong ML, Wong TS, Wu C, Xing TY, Yamaguchi H, Yamamoto A, Yamanaka M, Yamane T Yet al., 2020, COMET phase-I technical design report, Progress of Theoretical and Experimental Physics, Vol: 2020, ISSN: 2050-3911

The Technical Design for the COMET Phase-I experiment is presented in this paper. COMET is an experiment at J-PARC, Japan, which will search for neutrinoless conversion of muons into electrons in the field of an aluminum nucleus (⁠μ–e conversion, μ−N→e−N⁠); a lepton flavor-violating process. The experimental sensitivity goal for this process in the Phase-I experiment is 3.1×10−15⁠, or 90% upper limit of a branching ratio of 7×10−15⁠, which is a factor of 100 improvement over the existing limit. The expected number of background events is 0.032. To achieve the target sensitivity and background level, the 3.2 kW 8 GeV proton beam from J-PARC will be used. Two types of detectors, CyDet and StrECAL, will be used for detecting the μ–e conversion events, and for measuring the beam-related background events in view of the Phase-II experiment, respectively. Results from simulation on signal and background estimations are also described.

Journal article

Abe K, Akutsu R, Ali A, Alt C, Amey J, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Ashida Y, Atkin ET, Awataguchi Y, Azuma Y, Ban S, Barbi M, Barker GJ, Barr G, Barry C, Batkiewicz-Kwasniak M, Beloshapkin A, Bench F, Berardi V, Berkman S, Berner RM, Berns L, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bordoni S, Bourguille B, Boyd SB, Brailsford D, Bravar A, Bronner C, Avanzini MB, Calcutt J, Calland RG, Campbell T, Cao S, Cartwright SL, Castillo R, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Coleman J, Collazuol G, Cook L, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Di Lodovico F, Dokania N, Dolan S, Drapier O, Duffy KE, Dumarchez J, Dunne P, Eklund L, Emery-Schrenk S, Ereditato A, Fernandez P, Feusels T, Finch AJ, Fiorentini GA, Fiorillo G, Francois C, Friend M, Fujii Y, Fujita R, Fukuda D, Fukuda R, Fukuda Y, Gameil K, Garcia A, Giganti C, Gizzarelli F, Golan T, Gonin M, Gorin A, Guigue M, Hadley DR, Haegel L, Haigh JT, Hamacher-Baumann P, Hansen D, Harada J, Hartz M, Hasegawa T, Hastings NC, Hayashino T, Hayato Y, Hillairet A, Hiraki T, Hiramoto A, Hirota S, Hogan M, Holeczek J, Van NTH, Hosomi F, Huang K, Iacob F, Ichikawa AK, Ikeda M, Imber J, Inoue T, Insler J, Intonti RA, Ishida T, Ishii T, Ishitsuka M, Iwai E, Iwamoto K, Izmaylov A, Jamieson B, Jenkins SJ, Jesus-Valls C, Jiang M, Johnson S, Jonsson P, Jung CK, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Kataoka Y, Katori T, Kato Y, Kearns E, Khabibullin M, Khotjantsev A, Kim H, Kim J, King S, Kisiel J, Knight A, Knox A, Kobayashi T, Koch L, Koga T, Koller PP, Konaka A, Kormos LL, Koshio Y, Kowalik K, Kubo H, Kudenko Y, Kukita N, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamont I, Lamoureux M, Lasorak P, Laveder M, Lawe M, Licciardi M, Lindner T, Liptak ZJ, Litchfield RP, Liu SL, Li X, Longhin A, Lopez JP, Lou T, Ludovici L, Lu X, Lux T, Machado LN, Magaletti L, Mahn K, Malek Met al., 2020, Measurement of the muon neutrino charged-current single pi(+) production on hydrocarbon using the T2K off-axis near detector ND280, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 101, ISSN: 1550-2368

We report the measurements of the single and double differential cross section of muon neutrino charged-current interactions on carbon with a single positively charged pion in the final state at the T2K off-axis near detector using 5.56×1020 protons on target. The analysis uses data control samples for the background subtraction and the cross section signal, defined as a single negatively charged muon and a single positively charged pion exiting from the target nucleus, is extracted using an unfolding method. The model-dependent cross section, integrated over the T2K off-axis neutrino beam spectrum peaking at 0.6 GeV, is measured to be σ=(11.76±0.44(stat)±2.39(syst))×10−40  cm2 nucleon−1. Various differential cross sections are measured, including the first measurement of the Adler angles for single charged pion production in neutrino interactions with heavy nuclei target.

Journal article

Abe K, Akutsu R, Ali A, Alt C, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Ashida Y, Atkin ET, Awataguchi Y, Ban S, Barbi M, Barker GJ, Barr G, Barry C, Batkiewicz-Kwasniak M, Beloshapkin A, Bench F, Berardi V, Berkman S, Berns L, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bourguille B, Boyd SB, Brailsford D, Bravar A, Berguno DB, Bronner C, Bubak A, Avanzini MB, Calcutt J, Campbell T, Cao S, Cartwright SL, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Coleman J, Collazuol G, Cook L, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Di Lodovico F, Dokania N, Dolan S, Drapier O, Dumarchez J, Dunne P, Eklund L, Emery-Schrenk S, Ereditato A, Fernandez P, Feusels T, Finch AJ, Fiorentini GA, Fiorillo G, Francois C, Friend M, Fujii Y, Fujita R, Fukuda D, Fukuda R, Fukuda Y, Gameil K, Giganti C, Golan T, Gonin M, Gorin A, Guigue M, Hadley DR, Haigh JT, Hamacher-Baumann P, Hartz M, Hasegawa T, Hastings NC, Hayashino T, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Hong Van NT, Iacob F, Ichikawa AK, Ikeda M, Ishida T, Ishii T, Ishitsuka M, Iwamoto K, Izmaylov A, Jamieson B, Jenkins SJ, Jesus-Valls C, Jiang M, Johnson S, Jonsson P, Jung CK, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Kasetti SP, Kataoka Y, Katori T, Kato Y, Kearns E, Khabibullin M, Khotjantsev A, Kikawa T, Kim H, Kim J, King S, Kisiel J, Knight A, Knox A, Kobayashi T, Koch L, Koga T, Konaka A, Kormos LL, Koshio Y, Kowalik K, Kubo H, Kudenko Y, Kukita N, Kuribayashi S, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamoureux M, Laveder M, Lawe M, Licciardi M, Lindner T, Litchfield RP, Liu SL, Li X, Longhin A, Ludovici L, Lu X, Lux T, Machado LN, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Martin JF, Maruyama T, Matsubara T, Matsushita K, Matveev V, Mavrokoridis K, Mazzucato E, McCarthy M, McCauley N, McFarland KS, McGrew C, Mefodiev A, Metelko C, Mezzetto M, Minamino A, Mineev Oet al., 2019, Measurement of neutrino and antineutrino neutral-current quasielasticlike interactions on oxygen by detecting nuclear deexcitation gamma rays, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 100, Pages: 1-19, ISSN: 1550-2368

Neutrino- and antineutrino-oxygen neutral-current quasielasticlike interactions are measured at Super-Kamiokande using nuclear deexcitation γ rays to identify signal-like interactions in data from a 14.94(16.35)×1020 protons-on-target exposure of the T2K neutrino (antineutrino) beam. The measured flux-averaged cross sections on oxygen nuclei are ⟨σν−NCQE⟩=1.70±0.17(stat.)+0.51−0.38(syst.)×10−38  cm2/oxygen with a flux-averaged energy of 0.82 GeV and ⟨σ¯ν−NCQE⟩=0.98±0.16(stat.)+0.26−0.19(syst.)×10−38  cm2/oxygen with a flux-averaged energy of 0.68 GeV, for neutrinos and antineutrinos, respectively. These results are the most precise to date, and the antineutrino result is the first cross section measurement of this channel. They are compared with various theoretical predictions. The impact on evaluation of backgrounds to searches for supernova relic neutrinos at present and future water Cherenkov detectors is also discussed.

Journal article

Abe K, Akutsu R, Ali A, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Ashida Y, Awataguchi Y, Azuma Y, Ban S, Barbi M, Barker GJ, Barr G, Barry C, Batkiewicz-Kwasniak M, Bench F, Berardi V, Berkman S, Berner RM, Berns L, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bourguille B, Boyd SB, Brailsford D, Bravar A, Bronner C, Avanzini MB, Calcutt J, Campbell T, Cao S, Cartwright SL, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Coleman J, Collazuol G, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Di Lodovico F, Dokania N, Dolan S, Drapier O, Duffy KE, Dumarchez J, Dunne P, Emery-Schrenk S, Ereditato A, Fernandez P, Feusels T, Finch AJ, Fiorentini GA, Fiorillo G, Francois C, Friend M, Fujii Y, Fujita R, Fukuda D, Fukuda Y, Gameil K, Giganti C, Gizzarelli F, Golan T, Gonin M, Hadley DR, Haegel L, Haigh JT, Hamacher-Baumann P, Hartz M, Hasegawa T, Hastings NC, Hayashino T, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Van NTH, Hosomi F, Iacob F, Ichikawa AK, Ikeda M, Inoue T, Intonti RA, Ishida T, Ishii T, Ishitsuka M, Iwamoto K, Izmaylov A, Jamieson B, Jesus C, Jiang M, Johnson S, Jonsson P, Jung CK, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Katori T, Kato Y, Kearns E, Khabibullin M, Khotjantsev A, Kim H, Kim J, King S, Kisiel J, Knight A, Knox A, Kobayashi T, Koch L, Koga T, Koller PP, Konaka A, Kormos LL, Koshio Y, Kowalik K, Kubo H, Kudenko Y, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamoureux M, Lasorak P, Laveder M, Lawe M, Licciardi M, Lindner T, Liptak ZJ, Litchfield RP, Li X, Longhin A, Lopez JP, Lou T, Ludovici L, Lu X, Lux T, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Martin JF, Martins P, Maruyama T, Matsubara T, Matveev V, Mavrokoridis K, Ma WY, Mazzucato E, McCarthy M, McCauley N, McFarland KS, McGrew C, Mefodiev A, Metelko C, Mezzetto M, Minamino A, Mineev O, Mine S, Miura M, Bueno LM, Moriyama S, Morrison J, Mueller TAet al., 2019, Search for heavy neutrinos with the T2K near detector ND280, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 100, ISSN: 1550-2368

This paper reports on the search for heavy neutrinos with masses in the range 140<MN<493  MeV/c2 using the off-axis near detector ND280 of the T2K experiment. These particles can be produced from kaon decays in the standard neutrino beam and then subsequently decay in ND280. The decay modes under consideration are N→ℓ±απ∓ and N→ℓ+αℓ−β(−)ν(α,β=e,μ). A search for such events has been made using the Time Projection Chambers of ND280, where the background has been reduced to less than two events in the current dataset in all channels. No excess has been observed in the signal region. A combined Bayesian statistical approach has been applied to extract upper limits on the mixing elements of heavy neutrinos to electron-, muon- and tau- flavored currents (U2e, U2μ, U2τ) as a function of the heavy neutrino mass, e.g., U2e<10−9 at 90% C.L. for a mass of 390  MeV/c2. These constraints are competitive with previous experiments.

Journal article

Abe K, Akutsu R, Ali A, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Ashida Y, Awataguchi Y, Azuma Y, Ban S, Barbi M, Barker GJ, Barr G, Barry C, Batkiewicz-Kwasniak M, Bench F, Berardi V, Berkman S, Berner RM, Berns L, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bourguille B, Boyd SB, Brailsford D, Bravar A, Bronner C, Avanzini MB, Calcutt J, Campbell T, Cao S, Cartwright SL, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Coleman J, Collazuol G, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Di Lodovico F, Dokania N, Dolan S, Drapier O, Duffy KE, Dumarchez J, Dunne P, Emery-Schrenk S, Ereditato A, Fernandez P, Feusels T, Finch AJ, Fiorentini GA, Fiorillo G, Francois C, Friend M, Fujii Y, Fujita R, Fukuda D, Fukuda Y, Gameil K, Giganti C, Gizzarelli F, Golan T, Gonin M, Hadley DR, Haigh JT, Hamacher-Baumann P, Hartz M, Hasegawa T, Hastings NC, Hayashino T, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Hong Van NT, Hosomi F, Ichikawa AK, Ikeda M, Inoue T, Intonti RA, Ishida T, Ishii T, Ishitsuka M, Iwamoto K, Izmaylov A, Jamieson B, Jesus-Valls C, Jiang M, Johnson S, Jonsson P, Jung CK, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Katori T, Kato Y, Kearns E, Khabibullin M, Khotjantsev A, Kim H, Kim J, King S, Kisiel J, Knight A, Knox A, Kobayashi T, Koch L, Koga T, Konaka A, Kormos LL, Koshio Y, Kowalik K, Kubo H, Kudenko Y, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamoureux M, Lasorak P, Laveder M, Lawe M, Licciardi M, Lindner T, Litchfield RP, Li X, Longhin A, Lopez JP, Lou T, Ludovici L, Lu X, Lux T, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Martin JF, Martins P, Maruyama T, Matsubara T, Matveev V, Mavrokoridis K, Ma WY, Mazzucato E, McCarthy M, McCauley N, McFarland KS, McGrew C, Mefodiev A, Metelko C, Mezzetto M, Minamino A, Mineev O, Mine S, Miura M, Moriyama S, Morrison J, Mueller TA, Murphy S, Nagai Y, Nakadaira T, Nakahatet al., 2019, Measurement of the muon neutrino charged-current cross sections on water, hydrocarbon and iron, and their ratios, with the T2K on-axis detectors, Progress of Theoretical and Experimental Physics, Vol: 2019, Pages: 1-30, ISSN: 0033-068X

We report a measurement of the flux-integrated νμ charged-current cross sections on water, hydrocarbon, and iron in the T2K on-axis neutrino beam with a mean neutrino energy of 1.5 GeV. The measured cross sections on water, hydrocarbon, and iron are σH2OCC=(0.840±0.010(stat.)+0.10−0.08(syst.))×10−38cm2/nucleon, σCHCC=(0.817±0.007(stat.)+0.11−0.08(syst.))×10−38cm2/nucleon, and σFeCC=(0.859±0.003(stat.)+0.12−0.10(syst.))×10−38cm2/nucleon, respectively, for a restricted phase space of induced muons: θμ<45∘ and pμ>0.4 GeV/c in the laboratory frame. The measured cross section ratios are σH2OCC/σCHCC=1.028±0.016(stat.)±0.053(syst.)⁠, σFeCC/σH2OCC=1.023±0.012(stat.)±0.058(syst.)⁠, and σFeCC/σCHCC=1.049±0.010(stat.)±0.043(syst.)⁠. These results, with an unprecedented precision for the measurements of neutrino cross sections on water in the studied energy region, show good agreement with the current neutrino interaction models used in the T2K oscillation analyses.

Journal article

Abazov VM, Abbott B, Acharya BS, Adams M, Adams T, Agnew JP, Alexeev GD, Alkhazov G, Alton A, Askew A, Atkins S, Augsten K, Aushev V, Aushev Y, Avila C, Badaud F, Bagby L, Baldin B, Bandurin DV, Banerjee S, Barberis E, Baringer P, Bartlett JF, Bassler U, Bazterra V, Bean A, Begalli M, Bellantoni L, Beri SB, Bernardi G, Bernhard R, Bertram I, Besancon M, Beuselinck R, Bhat PC, Bhatia S, Bhatnagar V, Blazey G, Blessing S, Bloom K, Boehnlein A, Boline D, Boos EE, Borissov G, Borysova M, Brandt A, Brandt O, Brochmann M, Brock R, Bross A, Brown D, Bu XB, Buehler M, Buescher V, Bunichev V, Burdin S, Buszello CP, Camacho-Perez E, Casey BCK, Castilla-Valdez H, Caughron S, Chakrabarti S, Chan KM, Chandra A, Chapon E, Chen G, Cho SW, Choi S, Choudhary B, Cihangir S, Claes D, Clutter J, Cooke M, Cooper WE, Corcoran M, Couderc F, Cousinou M-C, Cuth J, Cutts D, Das A, Davies G, de Jong SJ, De La Cruz-Burelo E, Deliot F, Demina R, Denisov D, Denisov SP, Desai S, Deterre C, DeVaughan K, Diehl HT, Diesburg M, Ding PF, Dominguez A, Drutskoy A, Dubey A, Dudko LV, Duperrin A, Dutt S, Eads M, Edmunds D, Ellison J, Elvira VD, Enari Y, Evans H, Evdokimov A, Evdokimov VN, Faure A, Feng L, Ferbel T, Fiedler F, Filthaut F, Fisher W, Fisk HE, Fortner M, Fox H, Franc J, Fuess S, Garbincius PH, Garcia-Bellido A, Garcia-Gonzalez JA, Gavrilov V, Geng W, Gerber CE, Gershtein Y, Ginther G, Gogota O, Golovanov G, Grannis PD, Greder S, Greenlee H, Grenier G, Gris P, Grivaz J-F, Grohsjean A, Grunendahl S, Grunewald MW, Guillemin T, Gutierrez G, Gutierrez P, Haley J, Han L, Harder K, Harel A, Hauptman JM, Hays J, Head T, Hebbeker T, Hedin D, Hegab H, Heinson AP, Heintz U, Hensel C, Heredia-De La Cruz I, Herner K, Hesketh G, Hildreth MD, Hirosky R, Hoang T, Hobbs JD, Hoeneisen B, Hogan J, Hohlfeld M, Holzbauer JL, Howley I, Hubacek Z, Hynek V, Iashvili I, Ilchenko Y, Illingworth R, Ito AS, Jabeen S, Jaffre M, Jayasinghe A, Jeong MS, Jesik R, Jiang P, Johns K, Johnson E, Johnson M, Jonckheere A, Jonssonet al., 2019, Properties of Z(c)(+/-)(3900) produced in p(p)over-bar collisions, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 100, ISSN: 1550-2368

We study the production of the exotic charged charmoniumlike state Z±c(3900) in p¯p collisions through the sequential process ψ(4260)→Z±c(3900)π∓, Z±c(3900)→J/ψπ±. Using the subsample of candidates originating from semi-inclusive weak decays of b-flavored hadrons, we measure the invariant mass and natural width to be M=3902.6+5.2−5.0(stat)+3.3−1.4(syst)  MeV and Γ=32+28−21(stat)+26−7(syst)  MeV, respectively. We search for prompt production of the Z±c(3900) through the same sequential process. No significant signal is observed, and we set an upper limit of 0.70 at the 95% credibility level on the ratio of prompt production to the production via b-hadron decays. The study is based on 10.4  fb−1 of p¯p collision data collected by the D0 experiment at the Fermilab Tevatron collider.

Journal article

Abe K, Akutsu R, Ali A, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Ashida Y, Awataguchi Y, Azuma Y, Ban S, Barbi M, Barker GJ, Barr G, Barry C, Batkiewicz-Kwasniak M, Bench F, Berardi V, Berkman S, Berner RM, Berns L, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bourguille B, Boyd SB, Brailsford D, Bravar A, Bronner C, Avanzini MB, Calcutt J, Campbell T, Cao S, Cartwright SL, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Coleman J, Collazuol G, Coplowe D, Cudd A, Dabrowska A, Rosa GD, Dealtry T, Denner PF, Dennis SR, Densham C, Lodovico FD, Dokania N, Dolan S, Drapier O, Duffy KE, Dumarchez J, Dunne P, Emery-Schrenk S, Ereditato A, Fernandez P, Feusels T, Finch AJ, Fiorentini GA, Fiorillo G, Francois C, Friend M, Fujii Y, Fujita R, Fukuda D, Fukuda Y, Gameil K, Giganti C, Gizzarelli F, Golan T, Gonin M, Hadley DR, Haigh JT, Hamacher-Baumann P, Hartz M, Hasegawa T, Hastings NC, Hayashino T, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Van NTH, Hosomi F, Ichikawa AK, Ikeda M, Inoue T, Intonti RA, Ishida T, Ishii T, Ishitsuka M, Iwamoto K, Izmaylov A, Jamieson B, Jesus C, Jiang M, Johnson S, Jonsson P, Jung CK, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Katori T, Kato Y, Kearns E, Khabibullin M, Khotjantsev A, Kim H, Kim J, King S, Kisiel J, Knight A, Knox A, Kobayashi T, Koch L, Koga T, Konaka A, Kormos LL, Koshio Y, Kowalik K, Kubo H, Kudenko Y, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamoureux M, Lasorak P, Laveder M, Lawe M, Licciardi M, Lindner T, Litchfield RP, Li X, Longhin A, Lopez JP, Lou T, Ludovici L, Lu X, Lux T, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Martin JF, Martins P, Maruyama T, Matsubara T, Matveev V, Mavrokoridis K, Ma WY, Mazzucato E, McCarthy M, McCauley N, McFarland KS, McGrew C, Mefodiev A, Metelko C, Mezzetto M, Minamino A, Mineev O, Mine S, Miura M, Moriyama S, Morrison J, Mueller TA, Murphy S, Nagai Y, Nakadaira T, Nakahata M, Nakajimaet al., 2019, Search for neutral-current induced single photon production at the ND280 near detector in T2K, Journal of Physics G: Nuclear and Particle Physics, Vol: 46, ISSN: 0954-3899

Neutrino neutral-current (NC) induced single photon production is a sub-leading order process for accelerator-based neutrino beam experiments including T2K. It is, however, an important process to understand because it is a background for electron (anti)neutrino appearance oscillation experiments. Here, we performed the first search of this process below 1 GeV using the fine-grained detector at the T2K ND280 off-axis near detector. By reconstructing single photon kinematics from electron–positron pairs, we achieved 95% pure gamma ray sample from $5.738\times {10}^{20}$ protons-on-targets neutrino mode data. We do not find positive evidence of NC induced single photon production in this sample. We set the model-dependent upper limit on the cross-section for this process, at $0.114\times {10}^{-38}$ cm2 (90% C.L.) per nucleon, using the J-PARC off-axis neutrino beam with an average energy of $\left\langle {E}_{\nu }\right\rangle \sim 0.6$ GeV. This is the first limit on this process below 1 GeV which is important for current and future oscillation experiments looking for electron neutrino appearance oscillation signals.

Journal article

Abe K, Akutsu R, Ali A, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Ashida Y, Awataguchi Y, Azuma Y, Ban S, Barbi M, Barker GJ, Barr G, Barry C, Batkiewicz-Kwasniak M, Bench F, Berardi V, Berkman S, Berner RM, Berns L, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bourguille B, Boyd SB, Brailsford D, Bravar A, Bronner C, Avanzini MB, Calcutt J, Campbell T, Cao S, Cartwright SL, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Coleman J, Collazuol G, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Di Lodovico F, Dokania N, Dolan S, Drapier O, Duffy KE, Dumarchez J, Dunne P, Emery-Schrenk S, Ereditato A, Fernandez P, Feusels T, Finch AJ, Fiorentini GA, Fiorillo G, Francois C, Friend M, Fujii Y, Fujita R, Fukuda D, Fukuda Y, Gameil K, Giganti C, Gizzarelli F, Golan T, Gonin M, Hadley DR, Haigh JT, Hamacher-Baumann P, Hartz M, Hasegawa T, Hastings NC, Hayashino T, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Van NTH, Hosomi F, Iacob F, Ichikawa AK, Ikeda M, Inoue T, Intonti RA, Ishida T, Ishii T, Ishitsuka M, Iwamoto K, Izmaylov A, Jamieson B, Jesus C, Jiang M, Johnson S, Jonsson P, Jung CK, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Katori T, Kato Y, Kearns E, Khabibullin M, Khotjantsev A, Kim H, Kim J, King S, Kisiel J, Knight A, Knox A, Kobayashi T, Koch L, Koga T, Konaka A, Kormos LL, Koshio Y, Kowalik K, Kubo H, Kudenko Y, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamoureux M, Lasorak P, Laveder M, Lawe M, Licciardi M, Lindner T, Litchfield RP, Li X, Longhin A, Lopez JP, Lou T, Ludovici L, Lu X, Lux T, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Martin JF, Martins P, Maruyama T, Matsubara T, Matveev V, Mavrokoridis K, Ma WY, Mazzucato E, McCarthy M, McCauley N, McFarland KS, McGrew C, Mefodiev A, Metelko C, Mezzetto M, Minamino A, Mineev O, Mine S, Miura M, Bueno LM, Moriyama S, Morrison J, Mueller TA, Murphy S, Nagai Y, Nakadaira Tet al., 2019, Search for light sterile neutrinos with the T2K far detector Super-Kamiokande at a baseline of 295 km, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 99, ISSN: 1550-2368

We perform a search for light sterile neutrinos using the data from the T2K far detector at a baseline of 295 km, with an exposure of 14.7(7.6)×1020 protons on target in neutrino (antineutrino) mode. A selection of neutral-current interaction samples is also used to enhance the sensitivity to sterile mixing. No evidence of sterile neutrino mixing in the 3+1 model was found from a simultaneous fit to the charged-current muon, electron and neutral-current neutrino samples. We set the most stringent limit on the sterile oscillation amplitude sin2θ24 for the sterile neutrino mass splitting Δm241<3×10−3  eV2/c4.

Journal article

Abe K, Akutsu R, Amey J, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Ashida Y, Azuma Y, Ban S, Barbi M, Barker GJ, Barr G, Barry C, Batkiewicz M, Bench F, Ali A, Berardi V, Berkman S, Berner RM, Berns L, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bourguille B, Boyd SB, Brailsford D, Bravar A, Bronner C, Avanzini MB, Calcutt J, Campbell T, Cao S, Cartwright SL, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chilcuma N, Christodoulou G, Coleman J, Collazuol G, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Di Lodovico F, Dokania N, Dolan S, Drapier O, Duffy KE, Dumarchez J, Dunne P, Emery-Schrenk S, Ereditato A, Fernandez P, Feusels T, Finch AJ, Fiorentini GA, Fiorilloi G, Francois C, Friend M, Fujiii Y, Fujita R, Fukuda D, Fukuda Y, Gameil K, Giganti C, Gizzarelli F, Golan T, Gonin M, Hadley DR, Haegel L, Haigh JT, Hamacher-Baumann P, Hansen D, Harada J, Hartz M, Hasegawa T, Hastings NC, Hayashino T, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Hosomi F, Ichikawa AK, Ikeda M, Imber J, Inoue T, Intonti RA, Ishida T, Ishii T, Ishitsuka M, Iwamoto K, Izmaylov A, Jamieson B, Jiang M, Johnson S, Jonsson P, Jung CK, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Katori T, Kato Y, Kearns E, Khabibullin M, Khotjantsev A, Kim J, King S, Kisiel J, Knight A, Knox A, Kobayashi T, Koch L, Koga T, Koller PP, Konaka A, Kormos LL, Koshio Y, Kowailk K, Kubo H, Kudenko Y, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lasorak P, Laveder M, Lawe M, Licciarai M, Lindner T, Liptak ZJ, Litchfield RP, Li X, Longhin A, Lou T, Ludovici L, Lu X, Magalettii L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Martin JF, Martins P, Maruyama T, Matsubara T, Matveev V, Mavrokoridis K, Ma WY, Mazzucato E, McCarthy M, McCauley N, McFarland KS, McGrew C, Mefodiev A, Kim H, Lamoureux M, Lopez JP, Metelko C, Mezzetto M, Minamino A, Mineev O, Mine S, Missert A, Miura M, Moriyama S, Morrison J, Mueller TA, Murphy S, Naget al., 2018, Search for CP violation in neutrino and antineutrino oscillations by the T2K experiment with 2.2 x 10(21) protons on target, Physical Review Letters, Vol: 121, ISSN: 0031-9007

The T2K experiment measures muon neutrino disappearance and electron neutrino appearance in accelerator-produced neutrino and antineutrino beams. With an exposure of 14.7(7.6)×1020 protons on target in the neutrino (antineutrino) mode, 89 νe candidates and seven anti-νe candidates are observed, while 67.5 and 9.0 are expected for δCP=0 and normal mass ordering. The obtained 2σconfidence interval for the CP-violating phase, δCP, does not include the CP-conserving cases (δCP=0, π). The best-fit values of other parameters are sin2θ23=0.526+0.032−0.036 and Δm232=2.463+0.071−0.070×10−3  eV2/c4.

Journal article

Abazov VM, Abbott B, Acharya BS, Adams M, Adams T, Agnew JP, Alexeev GD, Alkhazov G, Alton A, Askew A, Atkins S, Augsten K, Aushev V, Aushev Y, Avila C, Badaud F, Bagby L, Baldin B, Bandurin D, Banerjee S, Barberis E, Baringer P, Bartlett JF, Bassler U, Bazterra V, Bean A, Begalli M, Bellantoni L, Beri SB, Bernardi G, Bernhard R, Bertram I, Besancon M, Beuselinck R, Bhat PC, Bhatia S, Bhatnagar V, Blazey G, Blessing S, Bloom K, Boehnlein A, Boline D, Boos EE, Borissov G, Borysova M, Brandt A, Brandt O, Brochmann M, Brock R, Bross A, Brown D, Bu XB, Buehler M, Buescher V, Bunichev V, Burdin S, Buszello CP, Camacho-Perez E, Casey BCK, Castilla-Valdez H, Caughron S, Chakrabarti S, Chan KM, Chandra A, Chapon E, Chen G, Cho SW, Choi S, Choudhary B, Cihangir S, Claes D, Clutter J, Cooke M, Cooper WE, Corcoran M, Couderc F, Cousinou M-C, Cuth J, Cutts D, Das A, Davies G, de Jong SJ, De La Cruz-Burelo E, Deliot F, Demina R, Denisov D, Denisov SP, Desai S, Deterre C, DeVaughan K, Diehl HT, Diesburg M, Ding PF, Dominguez A, Drutskoy A, Dubey A, Dudko L, Duperrin A, Dutt S, Eads M, Edmunds D, Ellison J, Elvira VD, Enari Y, Evans H, Evdokimov A, Evdokimov VN, Faure A, Feng L, Ferbel T, Fiedler F, Filthaut F, Fisher W, Fisk HE, Fortner M, Fox H, Franc J, Fuess S, Garbincius PH, Garcia-Bellido A, Garcia-Gonzalez JA, Gavrilov V, Geng W, Gerber CE, Gershtein Y, Ginther G, Gogota O, Golovanov G, Grannis PD, Greder S, Greenlee H, Grenier G, Gris P, Grivaz J-F, Grohsjean A, Grunendahl S, Grunewald MW, Guillemin T, Gutierrez G, Gutierrez P, Haley J, Han L, Harder K, Harel A, Hauptman JM, Hays J, Head T, Hebbeker T, Hedin D, Hegab H, Heinson AP, Heintz U, Hensel C, Heredia-De La Cruz I, Herner K, Hesketh G, Hildreth MD, Hirosky R, Hoang T, Hobbs JD, Hoeneisen B, Hogan J, Hohlfeld M, Holzbauer JL, Howley I, Hubacek Z, Hynek V, Iashvili I, Ilchenko Y, Illingworth R, Ito AS, Jabeen S, Jaffre M, Jayasinghe A, Jeong MS, Jesik R, Jiang P, Johns K, Johnson E, Johnson M, Jonckheere A, Jonsson Pet al., 2018, Evidence for Z(c)(+/-)(3900) in semi-inclusive decays of b-flavored hadrons, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 98, ISSN: 1550-2368

We present evidence for the exotic charged charmoniumlike state Z±c(3900) decaying to J/ψπ± in semi-inclusive weak decays of b-flavored hadrons. The signal is correlated with a parent J/ψπ+π− system in the invariant-mass range 4.2–4.7 GeV that would include the exotic structure Y(4260). The study is based on 10.4  fb−1 of p¯p collision data collected by the D0 experiment at the Fermilab Tevatron collider.

Journal article

Abe K, Amey J, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Ashida Y, Azuma Y, Ban S, Barbi M, Barker GJ, Barr G, Barry C, Batkiewicz M, Berardi V, Berkman S, Berner RM, Berns L, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bordoni S, Bourguille B, Boyd SB, Brailsford D, Bravar A, Bronner C, Avanzini MB, Calcutt J, Campbell T, Cao S, Cartwright SL, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Coleman J, Collazuol G, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Di Lodovico F, Dolan S, Drapier O, Duffy KE, Dumarchez J, Dunne P, Emery-Schrenk S, Ereditato A, Feusels T, Finch AJ, Fiorentini GA, Fiorillo G, Francois C, Friend M, Fujii Y, Fukuda D, Fukuda Y, Garcia A, Giganti C, Gizzarelli F, Golan T, Gonin M, Hadley DR, Haegel L, Haigh JT, Hamacher-Baumann P, Hansen D, Harada J, Hartz M, Hasegawa T, Hastings NC, Hayashino T, Hayato Y, Hiraki T, Hiramoto A, Hirota S, Hogan M, Holeczek J, Hosomi F, Ichikawa AK, Ikeda M, Imber J, Inoue T, Intonti RA, Ishida T, Ishii T, Iwamoto K, Izmaylov A, Jamieson B, Jiang M, Johnson S, Jonsson P, Jung CK, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Katori T, Kearns E, Khabibullin M, Khotjantsev A, Kim H, Kim J, King S, Kisiel J, Knight A, Knox A, Kobayashi T, Koch L, Koga T, Koller PP, Konaka A, Kormos LL, Koshio Y, Kowalik K, Kudenko Y, Kurjata R, Kutter T, Labarga L, Lagoda J, Lamont I, Lamoureux M, Lasorak P, Laveder M, Lawe M, Licciardi M, Lindner T, Liptak ZJ, Litchfield RP, Li X, Longhin A, Lopez JP, Lou T, Ludovici L, Lu X, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Martin JF, Martins P, Martynenko S, Maruyama T, Matveev V, Mavrokoridis K, Ma WY, Mazzucato E, McCarthy M, McCauley N, McFarland KS, McGrew C, Mefodiev A, Metelko C, Mezzetto M, Minamino A, Mineev O, Mine S, Missert A, Miura M, Moriyama S, Morrison J, Mueller TA, Nagai Y, Nakadaira T, Nakahata M, Nakamura KG, Nakamura K, Nakamura KDet al., 2018, Characterization of nuclear effects in muon-neutrino scattering on hydrocarbon with a measurement of final-state kinematics and correlations in charged-current pionless interactions at T2K, PHYSICAL REVIEW D, Vol: 98, ISSN: 2470-0010

This paper reports measurements of final-state proton multiplicity, muon and proton kinematics, and their correlations in charged-current pionless neutrino interactions, measured by the T2K ND280 near detector in its plastic scintillator (C8H8) target. The data were taken between years 2010 and 2013, corresponding to approximately 6×1020 protons on target. Thanks to their exploration of the proton kinematics and of imbalances between the proton and muon kinematics, the results offer a novel probe of the nuclear-medium effects most pertinent to the (sub-)GeV neutrino-nucleus interactions that are used in accelerator-based long-baseline neutrino oscillation measurements. These results are compared to many neutrino-nucleus interaction models which all fail to describe at least part of the observed phase space. In case of events without a proton above a detection threshold in the final state, a fully consistent implementation of the local Fermi gas model with multinucleon interactions gives the best description of the data. In the case of at least one proton in the final state, the spectral function model agrees well with the data, most notably when measuring the kinematic imbalance between the muon and the proton in the plane transverse to the incoming neutrino. Within the models considered, only the existence of multinucleon interactions are able to describe the extracted cross section within regions of high transverse kinematic imbalance. The effect of final-state interactions is also discussed.

Journal article

Abe K, Amey J, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Ashida Y, Azuma Y, Ban S, Barbi M, Barker GJ, Barr G, Barry C, Batkiewicz M, Berardi V, Berkman S, Berner RM, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bordoni S, Bourguille B, Boyd SB, Brailsford D, Bravar A, Bronner C, Avanzini MB, Calcutt J, Campbell T, Cao S, Cartwright SL, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Coleman J, Collazuol G, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Di Lodovico F, Dolan S, Drapier O, Duffy KE, Dumarchez J, Dunne P, Emery-Schrenk S, Ereditato A, Feusels T, Finch AJ, Fiorentini GA, Fiorillo G, Francois C, Friend M, Fujii Y, Fukuda D, Fukuda Y, Garcia A, Giganti C, Gizzarelli F, Golan T, Gonin M, Hadley DR, Haegel L, Haigh JT, Hamacher-Baumann P, Hansen D, Harada J, Hartz M, Hasegawa T, Hastings NC, Hayashino T, Hayato Y, Hiraki T, Hiramoto A, Hirota S, Hogan M, Holeczek J, Hosomi F, Ichikawa AK, Ikeda M, Imber J, Inoue T, Intonti RA, Ishida T, Ishii T, Iwamoto K, Izmaylov A, Jamieson B, Jiang M, Johnson S, Jonsson P, Jung CK, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Katori T, Kearns E, Khabibullin M, Khotjantsev A, Kim H, Kim J, King S, Kisiel J, Knight A, Knox A, Kobayashi T, Koch L, Koga T, Koller PP, Konaka A, Kormos LL, Koshio Y, Kowalik K, Kudenko Y, Kurjata R, Kutter T, Labarga L, Lagoda J, Lamont I, Lamoureux M, Lasorak P, Laveder M, Lawe M, Licciardi M, Lindner T, Liptak ZJ, Litchfield RP, Li X, Longhin A, Lopez JP, Lou T, Ludovici L, Lu X, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Martin JF, Martins P, Martynenko S, Maruyama T, Matveev V, Mavrokoridis K, Ma WY, Mazzucato E, McCarthy M, McCauley N, McFarland KS, McGrew C, Mefodiev A, Metelko C, Mezzetto M, Minamino A, Mineev O, Mine S, Missert A, Miura M, Moriyama S, Morrison J, Mueller TA, Nagai Y, Nakadaira T, Nakahata M, Nakamura KG, Nakamura K, Nakamura KD, Nakanishiet al., 2018, Measurement of inclusive double-differential nu(mu) charged-current cross section with improved acceptance in the T2K off-axis near detector, Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol: 98, ISSN: 1550-2368

We report a measurement of the flux-integrated cross section for inclusive muon neutrino charged-current interactions on carbon. The double-differential measurements are given as a function of the muon momentum and angle. Relative to our previous publication on this topic, these results have an increased angular acceptance and higher statistics. The data sample presented here corresponds to 5.7×1020 protons on target. The total flux-integrated cross section is measured to be (6.950±0.662)×10−39  cm2 nucleon−1 and is consistent with our simulation.

Journal article

Aaltonen T, Abazov VM, Abbott B, Acharya BS, Adams M, Adams T, Agnew JP, Alexeev GD, Alkhazov G, Alton A, Amerio S, Amidei D, Anastassov A, Annovi A, Antos J, Apollinari G, Appel JA, Arisawa T, Artikov A, Asaadi J, Ashmanskas W, Askew A, Atkins S, Auerbach B, Augsten KK, Aurisano A, Aushev V, Aushev Y, Avila C, Azfar F, Badaud F, Badgett W, Bae T, Bagby L, Baldin B, Bandurin DV, Banerjee S, Barbaro-Galtieri A, Barberis E, Baringer P, Barnes VE, Barnett BA, Barria P, Bartlett JF, Bartos P, Bassler U, Bauce M, Bazterra V, Bean A, Bedeschi F, Begalli M, Behari S, Bellantoni L, Bellettini G, Bellinger J, Benjamin D, Beretvas A, Beri SB, Bernardi G, Bernhard R, Bertram I, Besancon M, Beuselinck R, Bhat PC, Bhatia S, Bhatnagar V, Bhatti A, Bland KR, Blazey G, Blessing S, Bloom K, Blumenfeld B, Bocci A, Bodek A, Boehnlein A, Boline D, Boos EE, Borisov G, Bonoletto D, Borysova M, Boudreau J, Boveia A, Brandt A, Brandt O, Brigliadori L, Brochmann M, Brock R, Bromberg C, Bross A, Brown D, Brucken E, Bu XB, Budagov JJ, Budd HS, Buehler M, Buescher V, Bunichev V, Burdin S, Burkett K, Busetto G, Bussey P, Buszello CP, Butti P, Buzatu A, Calamba A, Camacho-Perez E, Camarda S, Campanelli M, Canelli F, Carls B, Carlsmith D, Carosi R, Carrillo S, Casal B, Casarsa M, Casey BCK, Castilla-Valdez H, Castro A, Catastini P, Caughron S, Cauz D, Cavaliere V, Cerri A, Cerrito L, Chakrabarti S, Chan KM, Chandra A, Chapon E, Chen G, Chen YC, Chertok M, Chiarelli G, Chlachidze G, Cho K, Cho SW, Choi S, Chokheli D, Choudhary B, Cihangir S, Claes D, Clark A, Clarke C, Clutter J, Convery MME, Conway J, Cooke MM, Cooper WE, Corbo M, Corcoran M, Cordelli M, Couderc F, Cousinou M-C, Cox CA, Cox DJ, Cremonesi M, Cruz D, Cuevas J, Culbertson R, Cuth J, Cutts D, Das A, d'Ascenzo N, Datta M, Davies G, de Barbaro P, de Jong SJ, De La Cruz-Burelo E, Deliot F, Demina R, Demortier L, Deninno M, Denisov D, Denisov SP, D'Errico M, Desai S, Deterre C, DeVaughan K, Devoto F, Di Canto A, Di Ruzza B, Diehl HT, Dieet al., 2018, Tevatron Run II combination of the effective leptonic electroweak mixing angle, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 97, ISSN: 1550-2368

Drell-Yan lepton pairs produced in the process p¯p→ℓ+ℓ−+X through an intermediate γ∗/Z boson have an asymmetry in their angular distribution related to the spontaneous symmetry breaking of the electroweak force and the associated mixing of its neutral gauge bosons. The CDF and D0 experiments have measured the effective-leptonic electroweak mixing parameter sin2θlepteff using electron and muon pairs selected from the full Tevatron proton-antiproton data sets collected in 2001-2011, corresponding to 9–10  fb−1 of integrated luminosity. The combination of these measurements yields the most precise result from hadron colliders, sin2θlepteff=0.23148±0.00033. This result is consistent with, and approaches in precision, the best measurements from electron-positron colliders. The standard model inference of the on-shell electroweak mixing parameter sin2θW, or equivalently the W-boson mass MW, using the zfitter software package yields sin2θW=0.22324±0.00033 or equivalently, MW=80.367±0.017  GeV/c2.

Journal article

Abazov VM, Abbott B, Acharya BS, Adams M, Adams T, Agnew JP, Alexeev GD, Alkhazov G, Alton A, Askew A, Atkins S, Augsten K, Aushev V, Aushev Y, Avila C, Badaud F, Bagby L, Baldin B, Bandurin DV, Banerjee S, Barberis E, Baringer P, Bartlett JF, Bassler U, Bazterra V, Bean A, Begalli M, Bellantoni L, Beri SB, Bernardi G, Bernhard R, Bertram I, Besancon M, Beuselinck R, Bhat PC, Bhatia S, Bhatnagar V, Blazey G, Blessing S, Bloom K, Boehnlein A, Boline D, Boos EE, Borissov G, Borysova M, Brandt A, Brandt O, Brochmann M, Brock R, Bross A, Brown D, Bu XB, Buehler M, Buescher V, Bunichev V, Burdin S, Buszello CP, Camacho-Perez E, Casey BCK, Castilla-Valdez H, Caughron S, Chakrabarti S, Chan KM, Chandra A, Chapon E, Chen G, Cho SW, Choi S, Choudhary B, Cihangir S, Claes D, Clutter J, Cooke M, Cooper WE, Corcoran M, Couderc F, Cousinou M-C, Cuth J, Cutts D, Das A, Davies G, de Jong SJ, De La Cruz-Burelo E, Deliot F, Demina R, Denisov D, Denisov SP, Desai S, Deterre C, DeVaughan K, Diehl HT, Diesburg M, Ding PF, Dominguez A, Drutskoy A, Dubey A, Dudko LV, Duperrin A, Dutt S, Eads M, Edmunds D, Ellison J, Elvira VD, Enari Y, Evans H, Evdokimov A, Evdokimov VN, Faure A, Feng L, Ferbel T, Fiedler F, Filthaut F, Fisher W, Fisk HE, Fortner M, Fox H, Franc J, Fuess S, Garbincius PH, Garcia-Bellido A, Garcia-Gonzalez JA, Gavrilov V, Geng W, Gerber CE, Gershtein Y, Ginther G, Gogota O, Golovanov G, Grannis PD, Greder S, Greenlee H, Grenier G, Gris P, Grivaz J-F, Grohsjean A, Grunendahl S, Grunewald MW, Guillemin T, Gutierrez G, Gutierrez P, Haley J, Han L, Harder K, Harel A, Hauptman JM, Hays J, Head T, Hebbeker T, Hedin D, Hegab H, Heinson AP, Heintz U, Hensel C, Heredia-De La Cruz I, Herner K, Hesketh G, Hildreth MD, Hirosky R, Hoang T, Hobbs JD, Hoeneisen B, Hogan J, Hohlfeld M, Holzbauer JL, Howley I, Hubacek Z, Hynek V, Iashvili I, Ilchenko Y, Illingworth R, Ito AS, Jabeen S, Jaffre M, Jayasinghe A, Jeong MS, Jesik R, Jiang P, Johns K, Johnson E, Johnson M, Jonckheere A, Jonssonet al., 2018, Measurement of the effective weak mixing angle in p(p)over-bar -> Z/gamma* -> l(+) l(-) events, Physical Review Letters, Vol: 120, Pages: 241802-1-241802-8, ISSN: 0031-9007

We present a measurement of the effective weak mixing angle parameter sin2θℓeff in p¯p→Z/γ∗→μ+μ− events at a center-of-mass energy of 1.96 TeV, collected by the D0 detector at the Fermilab Tevatron Collider and corresponding to 8.6  fb−1 of integrated luminosity. The measured value of sin2θℓeff[μμ]=0.23016±0.00064 is further combined with the result from the D0 measurement in p¯p→Z/γ∗→e+e− events, resulting in sin2θℓeff[comb]=0.23095±0.00040. This combined result is the most precise measurement from a single experiment at a hadron collider and is the most precise determination using the coupling of the Z/γ∗ to light quarks.

Journal article

Abe K, Abe K, Ahn SH, Aihara H, Aimi A, Akutsu R, Andreopoulos C, Anghel I, Anthony LHV, Antonova M, Ashida Y, Aushev V, Barbi M, Barker GJ, Barr G, Beltrame P, Berardi V, Bergevin M, Berkman S, Berns L, Berry T, Bhadra S, Blaszczyk FDM, Blondel A, Bolognesi S, Boyd SB, Bravar A, Bronner C, Avanzini MB, Cafagna FS, Calland R, Cao S, Cartwright SL, Catanesi MG, Checchia C, Chen-Wishart Z, Cheon BG, Cheoun MK, Cho K, Choi JH, Choi K, Choi KY, Chun EJ, Cole A, Coleman J, Collazuol G, Cowan G, Cremonesi L, Dealtry T, De Rosa G, Densham C, Dewhurst D, Drakopoulou E, Di Lodovico F, Drapier O, Dumarchez J, Dunne P, Dziewiecki M, Emery S, Esmaili A, Evangelisti A, Fernandez-Martinez E, Feusels T, Finch A, Fiorentini GA, Fiorillo G, Fitton M, Frankiewicz K, Friend M, Fujii Y, Fukuda Y, Fukuda D, Ganezer K, Ghosh M, Giganti C, Gonin M, Grant N, Gumplinger P, Hadley DR, Hartfiel B, Hartz M, Hayato Y, Hayrapetyan K, Hill J, Hirota S, Horiuchi S, Ichikawa AK, Iijima T, Ikeda M, Imber J, Inoue K, Insler J, Intonti RA, Ioannisian A, Ishida T, Ishino H, Ishitsuka M, Itow Y, Iwamoto K, Izmaylov A, Jamieson B, Jang HI, Jang JS, Jeon SH, Jeong KS, Jiang M, Jonsson P, Joo KK, Kaboth A, Kachulis C, Kajita T, Kang SK, Kameda J, Kataoka Y, Katori T, Kayrapetyan K, Kearns E, Khabibullin M, Khotjantsev A, Kim CS, Kim HB, Kim HJ, Kim JH, Kim J-S, Kim JY, Kim SB, Kim SC, Kim S-W, Kim SY, Kim TJ, Kim W, King S, Kishimoto Y, Ko P, Kobayashi T, Koga M, Konaka A, Kormos LL, Koshio Y, Korzenev A, Kowalik KL, Kropp WR, Kudenko Y, Kurjata R, Kutter T, Kuze M, Kwak K, Kwon EH, Labarga L, Lagoda J, Lasorak PJJ, Laveder M, Lawe M, Learned JG, Lee CH, Lee SJ, Lee WJ, Lim IT, Lindner T, Litchfield RP, Longhin A, Loverre P, Lou T, Ludovici L, Ma W, Magaletti L, Mahn K, Malek M, Maret L, Mariani C, Martens K, Marti L, Martin JF, Marzec J, Matsuno S, Mazzucato E, McCarthy M, McCauley N, McFarland KS, McGrew C, Mefodiev A, Mermod P, Metelko C, Mezzetto M, Migenda J, Mijakowski P, Minakata H, Minamino A, Mineet al., 2018, Physics potentials with the second Hyper-Kamiokande detector in Korea, Progress of Theoretical and Experimental Physics, Vol: 2018, ISSN: 2050-3911

Hyper-Kamiokande consists of two identical water-Cherenkov detectors of total 520 kt, with the first one in Japan at 295 km from the J-PARC neutrino beam with 2.5∘ off-axis angles (OAAs), and the second one possibly in Korea at a later stage. Having the second detector in Korea would benefit almost all areas of neutrino oscillation physics, mainly due to longer baselines. There are several candidate sites in Korea with baselines of 1000–1300 km and OAAs of 1∘–3∘⁠.We conducted sensitivity studies on neutrino oscillation physics for a second detector, either in Japan (JD ×2) or Korea (JD + KD), and compared the results with a single detector in Japan. Leptonic charge–parity (CP) symmetry violation sensitivity is improved, especially when the CP is non-maximally violated. The larger matter effect at Korean candidate sites significantly enhances sensitivities to non-standard interactions of neutrinos and mass ordering determination. Current studies indicate the best sensitivity is obtained at Mt. Bisul (1088 km baseline, 1.3∘ OAA). Thanks to a larger (1000 m) overburden than the first detector site, clear improvements to sensitivities for solar and supernova relic neutrino searches are expected.

Journal article

Abazov VM, Abbott B, Acharya BS, Adams M, Adams T, Agnew JP, Alexeev GD, Alkhazov G, Alton A, Askew A, Atkins S, Augsten K, Aushev V, Aushev Y, Avila C, Badaud F, Bagby L, Baldin B, Bandurin D, Banerjee S, Barberis E, Baringer P, Bartlett JF, Bassler U, Bazterra V, Bean A, Begalli M, Bellantoni L, Beri SB, Bernardi G, Bernhard R, Bertram I, Besancon M, Beuselinck R, Bhat PC, Bhatia S, Bhatnagar V, Blazey G, Blessing S, Bloom K, Boehnlein A, Boline D, Boos EE, Borissov G, Borysova M, Brandt A, Brandt O, Brochmann M, Brock R, Bross A, Brown D, Bu XB, Buehler M, Buescher V, Bunichev V, Burdin S, Buszello CP, Camacho-Perez E, Casey BCK, Castilla-Vaidez H, Caughron S, Chakrabarti S, Chan KM, Chandra A, Chapon E, Chen G, Cho SW, Choi S, Choudhary B, Cihangir S, Claes D, Clutter J, Cooke M, Cooper WE, Corcoran M, Couderc F, Cousinou M-C, Cuth J, Cutts D, Das A, Davies G, de Jong SJ, De La Cruz-Burelo E, Deliot F, Demina R, Denisov D, Denisov SP, Desai S, Deterre C, DeVaughan K, Diehl HT, Diesburg M, Ding PF, Dominguez A, Drutskoy A, Dubey A, Dudko L, Duperrin A, Dutt S, Eads M, Edmunds D, Ellison J, Elvira VD, Enari Y, Evans H, Evdokimov A, Evdokimov VN, Faure A, Feng L, Ferbe T, Fiedler F, Filthaut F, Fisher W, Fisk HE, Fortne M, Fox H, Franc J, Fuess S, Garbincius PH, Garcia-Bellido A, Garcia-Gonzalez JA, Gavrilov V, Geng W, Gerber CE, Gershtein Y, Ginther G, Gogota O, Golovanov G, Grannis PD, Greder S, Greenlee H, Grenier G, Gris P, Grivaz J-F, Grohsjean A, Grunendahl S, Grunewald MW, Guillemin T, Gutierrez G, Gutierrez P, Haley J, Han L, Harder K, Harel A, Hauptman JM, Hays J, Head T, Hebbeker T, Hedin D, Hegab H, Heinson AP, Heintz U, Hensel C, Heredia-De La Cruz I, Herner K, Hesketh G, Hildreth MD, Hirosky R, Hoang T, Hobbs JD, Hoeneisen B, Hogan J, Hohlfeld M, Holzbauer JL, Howley I, Hubacek Z, Hynek V, Iashvili I, Ilchenko Y, Illingworth R, Ito AS, Jabeen S, Jaffre M, Jayasinghe A, Jeong MS, Jesik R, Jiang P, Johns K, Johnson E, Johnson M, Jonckheere A, Jonsson Pet al., 2018, Study of the X-+/-(5568) state with semileptonic decays of the B-s(0) meson, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 97, ISSN: 1550-2368

We present a study of the X±(5568) using semileptonic decays of the B0s meson using the full run II integrated luminosity of 10.4  fb−1 in proton-antiproton collisions at a center of mass energy of 1.96 TeV collected with the D0 detector at the Fermilab Tevatron Collider. We report evidence for a narrow structure, X±(5568), in the decay sequence X±(5568)→B0sπ± where B0s→μ∓D±sX, D±s→ϕπ± which is consistent with the previous measurement by the D0 Collaboration in the hadronic decay mode, X±(5568)→B0sπ± where B0s→J/ψϕ. The mass and width of this state are measured using a combined fit of the hadronic and semileptonic data, yielding m=5566.9+3.2−3.1(stat)+0.6−1.2(syst)  MeV/c2, Γ=18.6+7.9−6.1(stat)+3.5−3.8(syst)  MeV/c2 with a significance of 6.7σ.

Journal article

Abe K, Amey J, Andreopoulos C, Antonova M, Aoki S, Ariga A, Ashida Y, Assylbekov S, Autiero D, Ban S, Barbi M, Barker GJ, Barr G, Barry C, Bartet-Friburg P, Batkiewicz M, Berardi V, Berkman S, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bordoni S, Boyd SB, Brailsford D, Bravar A, Bronner C, Avanzini MB, Calland RG, Campbell T, Cao S, Cartwright SL, Castillo R, Catanesi MG, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Clifton A, Coleman J, Collazuol G, Coplowe D, Cremonesi L, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Dewhurst D, Di Lodovico F, Di Luise S, Dolan S, Drapier O, Duffy KE, Dumarchez J, Dunkman M, Dunne P, Dziewiecki M, Emery-Schrenk S, Ereditato A, Feusels T, Finch AJ, Fiorentini GA, Friend M, Fujii Y, Fukuda D, Fukuda Y, Furmanski AP, Galymov V, Garcia A, Giffin SG, Giganti C, Gilje K, Gizzarelli F, Golan T, Gonin M, Grant N, Hadley DR, Haegel L, Haigh JT, Hamilton P, Hansen D, Harada J, Hara T, Hartz M, Hasegawa T, Hastings NC, Hayashino T, Hayato Y, Helmer RL, Hierholzer M, Hillairet A, Himmel A, Hiraki T, Hiramoto A, Hirota S, Hogan M, Holeczek J, Hosomi F, Huang K, Ichikawa AK, Ieki K, Ikeda M, Imber J, Insler J, Intonti RA, Irvine TJ, Ishida T, Ishii T, Iwai E, Iwamoto K, Izmaylov A, Jacob A, Jamieson B, Jiang M, Johnson S, Jo JH, Jonsson P, Jung CK, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Karpikov I, Katori T, Kearns E, Khabibullin M, Khotjantsev A, Kielczewska D, Kikawa T, Kim H, Kim J, King S, Kisiel J, Knight A, Knox A, Kobayashi T, Koch L, Koga T, Koller PP, Konaka A, Kondo K, Kopylov A, Kormos LL, Korzenev A, Koshio Y, Kowalik K, Kropp W, Kudenko Y, Kurjata R, Kutter T, Lagoda J, Lamont I, Lamoureux M, Larkin E, Lasorak P, Laveder M, Lawe M, Lazos M, Licciardi M, Lindner T, Liptak ZJ, Litchfield RP, Li X, Longhin A, Lopez JP, Lou T, Ludovici L, Lu X, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino AD, Marteau J, Martin JF, Martins P, Martynenkoet al., 2018, Measurement of the single pi(0) production rate in neutral current neutrino interactions on water, Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol: 97, ISSN: 1550-2368

The single π0 production rate in neutral current neutrino interactions on water in a neutrino beam with a peak neutrino energy of 0.6 GeV has been measured using the PØD, one of the subdetectors of the T2K near detector. The production rate was measured for data taking periods when the PØD contained water (2.64 × 1020 protons-on-target) and also periods without water (3.49 × 1020 protons-on-target). A measurement of the neutral current single π0 production rate on water is made using appropriate subtraction of the production rate with water in from the rate with water out of the target region. The subtraction analysis yields 106 ± 41 ± 69 signal events where the uncertainties are statistical (stat.) and systematic (sys.) respectively. This is consistent with the prediction of 157 events from the nominal simulation. The measured to expected ratio is 0.68 ± 0.26 (stat) ± 0.44 (sys) ± 0.12 (flux). The nominal simulation uses a flux integrated cross section of 7.63 × 10−39cm2 per nucleon with an average neutrino interaction energy of 1.3 GeV.

Journal article

Aaltonen T, Abazov VM, Abbott B, Acharya BS, Adams M, Adams T, Agnew JP, Alexeev GD, Alkhazov G, Alton A, Amerio S, Amidei D, Anastassov A, Annovi A, Antos J, Apollinari G, Appel JA, Arisawa T, Artikov A, Asaadi J, Ashmanskas W, Askew A, Atkins S, Auerbach B, Augsten K, Aurisano A, Aushev V, Aushev Y, Avila C, Azfar F, Badaud F, Badgett W, Bae T, Bagby L, Baldin B, Bandurin DV, Banerjee S, Barbaro-Galtieri A, Barberis E, Baringer P, Barnes VE, Barnett BA, Barria P, Bartlett JF, Bartos P, Bassler U, Bauce M, Bazterra V, Bean A, Bedeschi F, Begalli M, Behari S, Bellantoni L, Bellettini G, Bellinger J, Benjamin D, Beretvas A, Beri SB, Bernardi G, Bernhard R, Bertram I, Besancon M, Beuselinck R, Bhat PC, Bhatia S, Bhatnagar V, Bhatti A, Bland KR, Blazey G, Blessing S, Bloom K, Blumenfeld B, Bocci A, Bodek A, Boehnlein A, Boline D, Boos EE, Borissov G, Bortoletto D, Borysova M, Boudreau J, Boveia A, Brandt A, Brandt O, Brigliadori L, Brochmann M, Brock R, Bromberg C, Bross A, Brown D, Brucken E, Bu XB, Budagov J, Budd HS, Buehler M, Buescher V, Bunichev V, Burdin S, Burkett K, Busetto G, Bussey P, Buszello CP, Butti P, Buzatu A, Calamba A, Camacho-Perez E, Camarda S, Campanelli M, Canelli F, Carls B, Carlsmith D, Carosi R, Carrillo S, Casal B, Casarsa M, Casey BCK, Castilla-Valdez H, Castro A, Catastini P, Caughron S, Cauz D, Cavaliere V, Cerri A, Cerrito L, Chakrabarti S, Chan KM, Chandra A, Chapelain A, Chapon E, Chen G, Chen YC, Chertok M, Chiarelli G, Chlachidze G, Cho K, Cho SW, Choi S, Chokheli D, Choudhary B, Cihangir S, Claes D, Clark A, Clarke C, Clutter J, Convery ME, Conway J, Cooke M, Cooper WE, Corbo M, Corcoran M, Cordelli M, Couderc F, Cousinou M-C, Cox CA, Cox DJ, Cremonesi M, Cruz D, Cuevas J, Culbertson R, Cuth J, Cutts D, Das A, d'Ascenzo N, Datta M, Davies G, de Barbaro P, de Jong SJ, De La Cruz-Burelo E, Deliot F, Demina R, Demortier L, Deninno M, Denisov D, Denisov SP, D'Errico M, Desai S, Deterre C, DeVaughan K, Devoto F, Di Canto A, Di Ruzza B, Diet al., 2018, Combined forward-backward asymmetry measurements in top-antitop quark production at the Tevatron, Physical Review Letters, Vol: 120, Pages: 042001-1-042001-12, ISSN: 0031-9007

The CDF and D0 experiments at the Fermilab Tevatron have measured the asymmetry between yields of forward- and backward-produced top and antitop quarks based on their rapidity difference and the asymmetry between their decay leptons. These measurements use the full data sets collected in proton-antiproton collisions at a center-of-mass energy of √s=1.96  TeV. We report the results of combinations of the inclusive asymmetries and their differential dependencies on relevant kinematic quantities. The combined inclusive asymmetry is At¯tFB=0.128±0.025. The combined inclusive and differential asymmetries are consistent with recent standard model predictions.

Journal article

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