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  • Journal article
    Chatterjee S, Mazumdar D, Das I, 2026,

    A-site disorder driven competing magnetic phases and large magnetoresistance in R0.5B0.5MnO3 [R, B = Nd, Sm, Sr, Ba]

    , Journal of Physics and Chemistry of Solids, Vol: 209, ISSN: 0022-3697

    The interplay between A-site cationic disorder and electronic bandwidth in the doped manganite compounds governs their emergent magnetic and electronic transport properties, offering a rich platform for exploring correlated electron phenomena. Here, we investigate the polycrystalline Nd<inf>0.25</inf>Sm<inf>0.25</inf>Sr<inf>0.425</inf>Ba<inf>0.075</inf>MnO<inf>3</inf> (NSSBMO) system, where strategic Ba<sup>2+</sup>-ion substitution at the Sr-site introduces significant disorder, while tuning the average A-site ionic radius. Structural analysis reveals an orthorhombic (Pnma space group) phase crystal structure with prominent distorted MnO<inf>6</inf> octahedra, corroborated by a Goldschmidt tolerance factor (t<inf>g</inf>=0.982) deviating from ideal cubic symmetry. Magnetization studies unveil successive transitions: a paramagnetic (PM) to ferromagnetic (FM) transition at T<inf>C</inf>≈148 K, followed by an FM to antiferromagnetic (AFM) transition below T<inf>N</inf>≃48 K, and finally the system settled down to Sm<sup>3+</sup>/Nd<sup>3+</sup>-polarized AFM ground state at very low-temperatures. Electrical transport measurements reveal a metal-to-insulator transition (MIT) at T<inf>MIT</inf>≈125 K, closely correlated with magnetic ordering, underscoring strong magneto-electronic coupling. Notably, our studied FM predominant system achieves a colossal magnetoresistance (CMR) of -MR≈2500% around 75 K for ΔH=90 kOe, driven by dual mechanisms−low-field spin-polarized tunneling (50% contribution to the total MR) at grain boundaries and high-field intrinsic double-exchange interactions. Unconventional high-field exchange bias and an FM-insulating regime, where FM spin alignment coexists with inhibited e<inf>g</inf> electron percolation, further highlight the phase competition. T
  • Journal article
    Oishi K, Aoki M, Kuribayashi S, Ueda S, Ueno K, Chadeau N, Clouvel T, Fujii Y, Fukao Y, Higashide M, Igarashi Y, Mihara S, Nishiguchi H, Okabe K, Uchida Yet al., 2026,

    Development of the Range Counter for the COMET Phase-α Experiment

    , NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, Vol: 1082, ISSN: 0168-9002
  • Journal article
    Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Dragicevic M, Giordano C, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Shooshtari M, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Kwon H, Ocampo Henao D, Van Laer T, Van Mechelen P, Bierkens J, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Kashko P, Lowette S, Makarenko I, Müller D, Song J, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Malara A, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, Zhang F, De Coen M, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Skovpen K, Van Den Bossche N, van der Linden J, Vandenbroeck J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Cappati A, De Favereau De Jeneret J, Delaere C, Giammanco A, Guzel AO, Lemaitre V, Lidrych J, Malek P, Mastrapasqua P, Turkcapar S, Alves GA, Barroso Ferreira Filho M, Coelho E, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Brandao Malbouisson H, Carvalho W, Chinellato J, Costa Reis M, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Jesus SS, Laux Kuhn T, Macedo M, Mota Amarilo K, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Torres Da Silva De Araujo F, Bernardes CA, Tomei TRFP, Gregores EM, Lopes Da Costa B, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Aleksandrov A, Antchev G, Danev P, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Keshri S, Laroze D, Thakur S, Brooks W, Cheng T, Javaid T, Wang L, Yuan L, Hu Z, Liang Z, Liu J, Wang X, Chen GM, Chen HS, Chen M, Chen Y, Hou Q, Hou X, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu G, Liu Z-A, Song JNet al., 2025,

    Search for charged lepton flavor violating <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>Z</mml:mi> </mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msup> <mml:mi>Z</mml:mi> <mml:mo>′</mml:mo> </mml:msup> </mml:math> boson decays in proton-proton collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>13</mml:mn> <mml:mtext> </mml:mtext> <mml:mtext> </mml:mtext> <mml:mi>TeV</mml:mi> </mml:math>

    , Physical Review D, Vol: 112, ISSN: 2470-0010

    <jats:p> A search for flavor violating decays of the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mi>Z</a:mi> </a:math> boson to charged leptons is performed using data from proton-proton collisions at <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"> <c:msqrt> <c:mi>s</c:mi> </c:msqrt> <c:mo>=</c:mo> <c:mn>13</c:mn> <c:mtext> </c:mtext> <c:mtext> </c:mtext> <c:mi>TeV</c:mi> </c:math> collected with the CMS detector at the LHC, corresponding to an integrated luminosity of <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"> <e:mn>138</e:mn> <e:mtext> </e:mtext> <e:mtext> </e:mtext> <e:msup> <e:mi>fb</e:mi> <e:mrow> <e:mo>−</e:mo> <e:mn>1</e:mn> </e:mrow> </e:msup> </e:math> . Each of the decays <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"> <g:mi>Z</g:mi> <g:mo stretchy="false">→</g:mo> <g:mi>e</g:mi>
  • Journal article
    Abe A, Abe S, Akutsu R, Alarakia-Charles H, Hakim YIA, Monsalve SA, Anthony L, Aoki S, Apte KA, Arai T, Arihara T, Arimoto S, Ashida Y, Atkin ET, Babu N, Baranov V, Barker GJ, Barr G, Barrow D, Bates P, Bathe-Peters L, Batkiewicz-Kwasniak M, Baudis N, Berardi V, Berns L, Bhattacharjee S, Blanchet A, Blondel A, Boistier PMM, Bolognesi S, Bordoni S, Boyd SB, Bronner C, Bubak A, Avanzini MB, Caballero JA, Cadoux F, Calabria NF, Cao S, Cap S, Carabadjac D, Cartwright SL, Casado MP, Catanesi MG, Chakrani J, Chalumeau A, Cherdack D, Chong PS, Chvirova A, Coleman J, Collazuol G, Cormier F, Craplet AAL, Cudd A, Dago D, Dalmazzone C, Daret T, Dasgupta P, Davis C, Davydov YI, de Perio P, De Rosa G, Dealtry T, Densham C, Dergacheva A, Banerjee RD, Lodovico FD, Lopez GD, Dolan S, Douqa D, Doyle TA, Drapier O, Duffy KE, Dumarchez J, Dunne P, Dygnarowicz K, Eguchi A, Elias J, Emery-Schrenk S, Erofeev G, Ershova A, Eurin G, Fedorova D, Fedotov S, Feltre M, Feng L, Ferlewicz D, Finch AJ, Fitton MD, Forza C, Friend M, Fujii Y, Fukuda Y, Furui Y, García-Marcos J, Germer AC, Giannessi L, Giganti C, Girgus M, Glagolev V, Gonin M, Jiménez RG, Rosa JG, Goodman EAG, Gorshanov K, Govindaraj P, Grassi M, Guigue M, Guo FY, Hadley DR, Han S, Harris DA, Harris RJ, Hasegawa T, Hasnip CM, Hassani S, Hastings NC, Hayato Y, Heitkamp I, Henaff D, Hino Y, Holeczek J, Holin A, Holvey T, Van NTH, Honjo T, Hooft MCF, Hosokawa K, Hu J, Ichikawa AK, Ieki K, Ikeda M, Ishida T, Ishitsuka M, Ito H, Ito S, Izmaylov A, Jachowicz N, Jenkins SJ, Jesús-Valls C, Jia M, Jiang JJ, Ji JY, Jones TP, Jonsson P, Joshi S, Kabirnezhad M, Kaboth AC, Kakuno H, Kameda J, Karpova S, Kasturi VS, Kataoka Y, Katori T, Kawabata A, Kawamura Y, Kawaue M, Kearns E, Khabibullin M, Khotjantsev A, Kikawa T, King S, Kiseeva V, Kisiel J, Klustová A, Kneale L, Kobayashi H, Koch L, Kodama S, Kolupanova M, Konaka A, Kormos LL, Koshio Y, Kowalik K, Kudenko Y, Kudo Y, Jha AK, Kurjata R, Kurochka V, Kutter T, Labarga L, Lachat M, Lachner Ket al., 2025,

    Testing T2K’s Bayesian constraints with priors in alternate parameterisations

    , The European Physical Journal C, Vol: 85

    <jats:title>Abstract</jats:title> <jats:p>Bayesian analysis results require a choice of prior distribution. In long-baseline neutrino oscillation physics, the usual parameterisation of the mixing matrix induces a prior that privileges certain neutrino mass and flavour state symmetries. Here we study the effect of privileging alternate symmetries on the results of the T2K experiment. We find that constraints on the level of CP violation (as given by the Jarlskog invariant) are robust under the choices of prior considered in the analysis. On the other hand, the degree of octant preference for the atmospheric angle depends on which symmetry has been privileged.</jats:p>
  • Journal article
    Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Kwon H, Van Laer T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Malara A, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Skovpen K, Van Den Bossche N, van der Linden J, Vandenbroeck J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Turkcapar S, Alves GA, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Laux Kuhn T, Macedo M, Martins J, Mota Amarilo K, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Tomei TRFP, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Laroze D, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Carvalho Antunes De Olivet al., 2025,

    Measurement of event shapes in minimum-bias events from proton-proton collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>13</mml:mn> <mml:mtext> </mml:mtext> <mml:mtext> </mml:mtext> <mml:mi>TeV</mml:mi> </mml:math>

    , Physical Review D, Vol: 112, ISSN: 2470-0010

    <jats:p> A measurement of event-shape variables is presented, using a data sample produced in a special run with approximately one inelastic proton-proton collision per bunch crossing. The data were collected with the CMS detector at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mrow> <a:mn>64</a:mn> <a:mtext> </a:mtext> <a:mtext> </a:mtext> <a:mrow> <a:mi mathvariant="normal">μ</a:mi> <a:msup> <a:mrow> <a:mi mathvariant="normal">b</a:mi> </a:mrow> <a:mrow> <a:mo>−</a:mo> <a:mn>1</a:mn> </a:mrow> </a:msup> </a:mrow> </a:mrow> </a:math> . A number of observables related to the overall distribution of charged particles in the collisions are corrected for detector effects and compared with simulations. Inclusive event-shape distributions, as well as differential distributions of event shapes as functions of charged-particle multiplicity, are studied. None of the models investigated are able to satisfactorily describe the data. Moreover, there are significant features common amongst all generator setups studied, particularly showing data being more isotropic than any of the simulations. Multidimensional unfolded distributions are provided, along
  • Journal article
    Aaij R, Abdelmotteleb ASW, Abellan Beteta C, Abudinén F, Ackernley T, Adefisoye AA, Adeva B, Adinolfi M, Adlarson P, Agapopoulou C, Aidala CA, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Alessio F, Aliouche Z, Alvarez Cartelle P, Amalric R, Amato S, Amey JL, Amhis Y, An L, Anderlini L, Andersson M, Andreola P, Andreotti M, Andres Estrada S, Anelli A, Ao D, Archilli F, Areg Z, Argenton M, Arguedas Cuendis S, Artamonov A, Artuso M, Aslanides E, Ataíde Da Silva R, Atzeni M, Audurier B, Authier JA, Bacher D, Bachiller Perea I, Bachmann S, Bachmayer M, Back JJ, Baladron Rodriguez P, Balagura V, Balboni A, Baldini W, Balzani L, Bao H, Baptista de Souza Leite J, Barbero Pretel C, Barbetti M, Barbosa IR, Barlow RJ, Barnyakov M, Barsuk S, Barter W, Bartz J, Bashir S, Batsukh B, Battista PB, Bay A, Beck A, Becker M, Bedeschi F, Bediaga IB, Behling NA, Belin S, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Bernet Andres S, Bertolin A, Betancourt C, Betti F, Bex J, Bezshyiko I, Bezshyyko O, Bhom J, Bieker MS, Biesuz NV, Billoir P, Biolchini A, Birch M, Bishop FCR, Bitadze A, Bizzeti A, Blake T, Blanc F, Blank JE, Blusk S, Bocharnikov V, Boelhauve JA, Boente Garcia O, Boettcher T, Bohare A, Boldyrev A, Bolognani CS, Bolzonella R, Bonacci RB, Bondar N, Bordelius A, Borgato F, Borghi S, Borsato M, Borsuk JT, Bottalico E, Bouchiba SA, Bovill M, Bowcock TJV, Boyer A, Bozzi C, Brandenburg JD, Brea Rodriguez A, Breer N, Brodzicka J, Brossa Gonzalo A, Brown J, Brundu D, Buchanan E, Buonincontri L, Burgos Marcos M, Burke AT, Burr C, Butter JS, Buytaert J, Byczynski W, Cadeddu S, Cai H, Cai Y, Caillet A, Calabrese R, Calderon Ramirez S, Calefice L, Cali S, Calvi M, Calvo Gomez M, Camargo Magalhaes P, Cambon Bouzas JI, Campana P, Campora Perez DH, Campoverde Quezada AF, Capelli S, Capriotti L, Caravaca-Mora R, Carbone A, Carcedo Salgado L, Cardinale R, Cardini A, Carniti P, Carus L, Casais Vidal A, Caspary R, Casse G, Cattaneo M, Cavalet al., 2025,

    Observation of Orbitally Excited B_{c}^{+} States.

    , Phys Rev Lett, Vol: 135

    The observation of a wide peaking structure in the B_{c}^{+}γ mass spectrum is reported using proton-proton collision data collected by the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9  fb^{-1}. The statistical significance over the background-only hypothesis exceeds seven standard deviations. The width of the observed structure is larger than the expectation from a single-peak hypothesis, and is well described by an effective minimal model consisting of two narrow peaks located at 6704.8±5.5±2.8±0.3  MeV/c^{2} and 6752.4±9.5±3.1±0.3  MeV/c^{2}. The uncertainty terms are statistical, systematic, and associated to the knowledge of the B_{c}^{+} mass, respectively. The measured peak locations are in line with theoretical predictions for lowest excited P-wave B_{c}^{+} states, marking the first observation of orbitally excited beauty-charm mesons and providing important insights into the internal dynamics of hadrons containing two heavy quarks.
  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Van Laer T, Van Mechelen P, Breugelmans N, D'Hondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Lentdecker G, Evard H, Favart L, Gianneios P, Jaramillo J, Khalilzadeh A, Khan FA, Lee K, Mahdavikhorrami M, Malara A, Paredes S, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Hong Y, Knolle J, Lambrecht L, Marckx D, Mota Amarilo K, Skovpen K, Van Den Bossche N, van der Linden J, Wezenbeek L, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Alves GA, Alves Gallo Pereira M, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Laux Kuhn T, Macedo M, Martins J, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Tomei TRFP, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Laroze D, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Carvalho Antunes De Oliveira A, Deng S, Guo B, Jiang C, Levin A, Li C, Li Q, Maet al., 2025,

    Search for New Physics in Jet Multiplicity Patterns of Multilepton Events at sqrt[s]=13  TeV.

    , Phys Rev Lett, Vol: 135

    A first search for beyond the standard model physics in jet multiplicity patterns of multilepton events is presented, using a data sample corresponding to an integrated luminosity of 138  fb^{-1} of 13 TeV proton-proton collisions recorded by the CMS detector at the LHC. The search uses observed jet multiplicity distributions in one-, two-, and four-lepton events to explore possible enhancements in jet production rate in three-lepton events with and without bottom quarks. The data are found to be consistent with the standard model expectation. The results are interpreted in terms of supersymmetric production of electroweak chargino-neutralino superpartners with cascade decays terminating in prompt hadronic R-parity violating interactions.
  • Journal article
    Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Dragicevic M, Giordano C, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Matthewman M, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Shooshtari M, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Kwon H, Henao DO, Laer TV, Mechelen PV, Bierkens J, Breugelmans N, DHondt J, Dansana S, Moor AD, Delcourt M, Heyen F, Hong Y, Kashko P, Lowette S, Makarenko I, Müller D, Song J, Tavernier S, Tytgat M, Onsem GPV, Putte SV, Vannerom D, Bilin B, Clerbaux B, Das AK, Bruyn ID, Lentdecker GD, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Malara A, Shahzad MA, Thomas L, Bemden MV, Velde CV, Vanlaer P, Zhang F, Coen MD, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Skovpen K, Van Den Bossche N, van der Linden J, Vandenbroeck J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Cappati A, De Favereau De Jeneret J, Delaere C, Giammanco A, Guzel AO, Lemaitre V, Lidrych J, Malek P, Mastrapasqua P, Turkcapar S, Alves GA, Filho MBF, Coelho E, Hensel C, De Oliveira TM, Herrera CM, Teles PR, Soeiro M, Manganote EJT, Pereira AV, Aldá Júnior WL, Malbouisson HB, Carvalho W, Chinellato J, Reis MC, Da Costa EM, Da Silveira GG, Damiao DDJ, De Souza SF, De Souza RG, Jesus SS, Kuhn TL, Macedo M, Amarilo KM, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Da Silva De Araujo FT, Bernardes CA, Fernandez Perez Tomei TR, Gregores EM, Da Costa BL, Silverio IM, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Aleksandrov A, Antchev G, Danev P, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Keshri S, Laroze D, Thakur S, Brooks W, Cheng T, Javaid T, Wang L, Yuan L, Hu Z, Liang Z, Liu J, Wang X, Chen GM, Chen HS, Chen M, Chen Y, Hou Q, Hou X, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu G, Liu Z-A, Song JN, Song S, Tao J, Wang C, Wang J, Zhang H, Zhao J, Agapitos A, Ban Y, De Oliveira ACA, Deng S, Guo B, Guo Q, Jianget al., 2025,

    Determination of the spin and parity of all-charm tetraquarks

    , Nature, Vol: 648, Pages: 58-63, ISSN: 0028-0836

    <jats:title>Abstract</jats:title> <jats:p> The traditional quark model <jats:sup>1,2</jats:sup> accounts for the existence of baryons, such as protons and neutrons, which consist of three quarks, as well as mesons, composed of a quark–antiquark pair. Only recently has substantial evidence started to accumulate for exotic states composed of four or five quarks and antiquarks <jats:sup>3</jats:sup> . The exact nature of their internal structure remains uncertain <jats:sup>4–29</jats:sup> . Here we report the first measurement of quantum numbers of the recently discovered family of three all-charm tetraquarks <jats:sup>30–32</jats:sup> , using data collected by the CMS experiment at the Large Hadron Collider from 2016 to 2018 (refs.  <jats:sup>33,34</jats:sup> ). The angular analysis techniques developed for the discovery and characterization of the Higgs boson <jats:sup>35–37</jats:sup> have been applied to the new exotic states. Here we show that the quantum numbers for parity <jats:italic>P</jats:italic> and charge conjugation <jats:italic>C</jats:italic> symmetries are found to be +1. The spin <jats:italic>J</jats:italic> of these exotic states is determined to be consistent with 2 <jats:italic>ħ</jats:italic> , while 0 <jats:italic>ħ</jats:italic> and 1 <jats:italic>ħ</jats:italic> are exclud
  • Journal article
    Collaboration TCMS, 2025,

    Search for heavy pseudoscalar and scalar bosons decaying to a top quark pair in proton–proton collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>13</mml:mn> <mml:mstyle/> <mml:mtext>TeV</mml:mtext> </mml:mrow> </mml:math>

    , Reports on Progress in Physics, Vol: 88, Pages: 127801-127801, ISSN: 0034-4885

    <jats:title>Abstract</jats:title> <jats:p> A search for pseudoscalar or scalar bosons decaying to a top quark pair ( <jats:inline-formula> <jats:tex-math> </jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mrow> <mml:mtext>t</mml:mtext> </mml:mrow> <mml:mrow> <mml:mover> <mml:mtext>t</mml:mtext> <mml:mo stretchy="false">¯</mml:mo> </mml:mover> </mml:mrow> </mml:mrow> </mml:math> </jats:inline-formula> ) in final states with one or two charged leptons is presented. The analyzed proton–proton collision data was recorded at <jats:inline-formula> <jats:tex-math> </jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>13</mml:mn> <mml:mstyle scriptlevel="0"/> <mml:mtext>TeV</mml:mtext> </mml:mrow
  • Journal article
    Hall G, 2025,

    The evolution of particle physics electronics

    , Journal of Instrumentation, Vol: 20, Pages: C12006-C12006

    <jats:title>Abstract</jats:title> <jats:p>Since the foundation of CERN in 1954, there have been significant changes in detector technologies which in turn have necessitated big changes in readout and data acquisition electronics. Many of them have taken place since about 1990 during preparations for LHC, profiting especially from the commercial impetus driving the rapid growth of consumer electronics. It is arguable that the most important developments in LHC particle physics detectors were in the electronics area, with increasing use of custom integrated circuits (ASICs) on an enormous scale compared to the past; the application of fibre-optic links, also on a large scale and previously virtually unknown in high energy physics, and rapid advances in programmable digital electronics, culminating in extremely large, powerful FPGAs, which have been exploited for flexible data acquisition and triggering. Using these rapidly-evolving technologies presented formidable technical challenges, fortunately mostly successfully overcome. However, even the largest particle physics applications are still on a very modest scale compared to commercial demands, raising issues such as access to manufacturers at reasonable costs and delivery schedules. The use of electronic circuitry actually predates CERN and some early applications, such as triggering detectors and storing data electronically, are still among those which drive developments today. It is informative to look at some history to try to foresee implications for the future.</jats:p>
  • Journal article
    Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Kwon H, Van Laer T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Lee K, Malara A, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Skovpen K, Van Den Bossche N, van der Linden J, Vandenbroeck J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Turkcapar S, Alves GA, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Laux Kuhn T, Macedo M, Martins J, Mota Amarilo K, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Tomei TRFP, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Laroze D, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Carvalho Antuneset al., 2025,

    Search for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>γ</mml:mi> <mml:mi>H</mml:mi> </mml:math> production and constraints on the Yukawa couplings of light quarks to the Higgs boson

    , Physical Review D, Vol: 112, ISSN: 2470-0010

    <jats:p> A search for <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mi>γ</a:mi> <a:mi>H</a:mi> </a:math> production is performed with data from the CMS experiment at the LHC corresponding to an integrated luminosity of <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"> <c:mn>138</c:mn> <c:mtext> </c:mtext> <c:mtext> </c:mtext> <c:msup> <c:mi>fb</c:mi> <c:mrow> <c:mo>−</c:mo> <c:mn>1</c:mn> </c:mrow> </c:msup> </c:math> at a proton-proton center-of-mass collision energy of <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"> <e:mrow> <e:mn>13</e:mn> <e:mtext> </e:mtext> <e:mtext> </e:mtext> <e:mi>TeV</e:mi> </e:mrow> </e:math> . The analysis focuses on the topology of a boosted Higgs boson recoiling against a high-energy photon. The final states of <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"> <g:mi>H</g:mi> <g:mo stretchy="false">→</g:mo>
  • Journal article
    Zwalinski L, Zou W, Zormpa O, Zorbas TG, Zoch K, Zoccoli A, Živkovic L, Ziolkowski M, Zinsser J, Zimine NI, Zhukov K, Zhuang X, Zhu Y, Zhu Y, Zhu X, Zhu J, Zhu CG, Zhou Y, Zhou Y, Zhou N, Zhou H, Zhou B, Zhong D, Zheng Z, Zheng X, Zheng K, Zheng J, Zhemchugov A, Zhao Z, Zhao Z, Zhao Y, Zhao T, Zhao H, Zhang Z, Zhang Z, Zhang Z, Zhang Y, Zhang Y, Zhang Y, Zhang X, Zhang X, Zhang T, Zhang S, Zhang S, Zhang R, Zhang P, Zhang L, Zhang L, Zhang K, Zhang J, Zhang J, Zhang DF, Zhai M, Zerwas D, Zerradi S, Zenz S, Ženiš T, Zenin O, Zenger DT, Zeng JC, Zeng H, Zeitnitz C, Zaplatilek O, Zanzi D, Zang J, Saa JAZ, Zambito S, Zakareishvili T, Zak ZK, Zaid E, Zabinski B, Zaazoua M, Yue L, Yuan R, Yuan M, Yuan J, Yu Y, Yu C, Young C, Young CJS, Younas S, Yorita K, Yin P, Yildirim TP, Yexley MR, Yeo BK, Yeletskikh I, Yeh Y, Ye X, Ye S, Ye J, Ye H, Ye H, Yao WM, Yang Z, Yang Y, Yang Y, Yang X, Yang X, Yang Tet al., 2025,

    Total Cost of Ownership and Evaluation of Google Cloud Resources for the ATLAS Experiment at the LHC

    , Computing and Software for Big Science, Vol: 9

    The ATLAS Google Project was established as part of an ongoing evaluation of the use of commercial clouds by the ATLAS Collaboration, in anticipation of the potential future adoption of such resources by WLCG grid sites to fulfil or complement their computing pledges. Seamless integration of Google cloud resources into the worldwide ATLAS distributed computing infrastructure was achieved at large scale and for an extended period of time, and hence cloud resources are shown to be an effective mechanism to provide additional, flexible computing capacity to ATLAS. For the first time a total cost of ownership analysis has been performed, to identify the dominant cost drivers and explore effective mechanisms for cost control. Network usage significantly impacts the costs of certain ATLAS workflows, underscoring the importance of implementing such mechanisms. Resource bursting has been successfully demonstrated, whilst exposing the true cost of this type of activity. A follow-up to the project is underway to investigate methods for improving the integration of cloud resources in data-intensive distributed computing environments and reducing costs related to network connectivity, which represents the primary expense when extensively utilising cloud resources.
  • Journal article
    Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Kwon H, Van Laer T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Malara A, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Skovpen K, Van Den Bossche N, van der Linden J, Vandenbroeck J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Turkcapar S, Alves GA, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Laux Kuhn T, Macedo M, Martins J, Mota Amarilo K, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Fernandez Perez Tomei TR, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Laroze D, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Carvalho Aet al., 2025,

    Search for a cH signal in the associated production of at least one charm quark with a Higgs boson in the diphoton decay channel in pp collisions at $$\sqrt{s}=13$$ TeV

    , Journal of High Energy Physics, Vol: 2025

    <jats:title> A <jats:sc>bstract</jats:sc> </jats:title> <jats:p> This paper presents the first search for a cH signal sensitive to the coupling of the charm quark (c) to the Higgs boson (H) in the associated production of at least one charm quark with a Higgs boson decaying to two photons. The results are based on a data set of proton-proton collisions at a center-of-mass energy of 13 TeV collected with the CMS experiment at the LHC, corresponding to an integrated luminosity of 138 fb <jats:sup> <jats:italic>−</jats:italic> 1 </jats:sup> . Assuming the standard model (SM) rates for all other Higgs boson production processes, the observed (expected) upper limit at 95% confidence level on the cH signal strength is 243 (355) times the SM prediction. Under the same assumption, the observed (expected) allowed interval on the Higgs boson to charm quark coupling modifier, <jats:italic>κ</jats:italic> <jats:sub>c</jats:sub> , is <jats:italic>|κ</jats:italic> <jats:sub>c</jats:sub> <jats:italic>| &lt;</jats:italic> 38 <jats:italic>.</jats:italic> 1 ( <jats:italic>|κ</jats:italic> <jats:sub>c</jats:sub> <jats:italic>| &lt;</jats:italic> 72 <jats:italic>.</jats:italic> 5) at 95% confidence level. </jats:p>
  • Journal article
    Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Damanakis K, Dragicevic M, Giordano C, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Shooshtari M, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Kwon H, Ocampo Henao D, Van Laer T, Van Mechelen P, Bierkens J, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Kashko P, Lowette S, Makarenko I, Müller D, Song J, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Malara A, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, Zhang F, De Coen M, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Skovpen K, Van Den Bossche N, van der Linden J, Vandenbroeck J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Cappati A, De Favereau De Jeneret J, Delaere C, Giammanco A, Guzel AO, Lemaitre V, Lidrych J, Malek P, Mastrapasqua P, Turkcapar S, Alves GA, Barroso Ferreira Filho M, Coelho E, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Brandao Malbouisson H, Carvalho W, Chinellato J, Costa Reis M, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Jesus SS, Laux Kuhn T, Macedo M, Mota Amarilo K, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Torres Da Silva De Araujo F, Bernardes CA, Fernandez Perez Tomei TR, Gregores EM, Lopes Da Costa B, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Aleksandrov A, Antchev G, Danev P, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Keshri S, Laroze D, Thakur S, Brooks W, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Wang X, Chen GM, Chen HS, Chen M, Chen Y, Hou Q, Hou X, Iemmi F, Jiang CH, Kapoor A, Liao H, Liuet al., 2025,

    A method for correcting the substructure of multiprong jets using the Lund jet plane

    , Journal of High Energy Physics, Vol: 2025

    <jats:title> A <jats:sc>bstract</jats:sc> </jats:title> <jats:p> Many analyses at the CERN LHC exploit the substructure of jets to identify heavy resonances produced with high momenta that decay into multiple quarks and/or gluons. This paper presents a new technique for correcting the substructure of simulated large-radius jets from multiprong decays. The technique is based on reclustering the jet constituents into several subjets such that each subjet represents a single prong, and separately correcting the radiation pattern in the Lund jet plane of each subjet using a correction derived from data. The data presented here correspond to an integrated luminosity of 138 fb <jats:sup> <jats:italic>−</jats:italic> 1 </jats:sup> collected by the CMS experiment between 2016–2018 at a center-of-mass energy of 13 TeV. The correction procedure improves the agreement between data and simulation for several different substructure observables of multiprong jets. This technique establishes, for the first time, a robust calibration for the substructure of jets with four or more prongs, enabling future measurements and searches for new phenomena containing these signatures. </jats:p>
  • Journal article
    Druzhkin D, Borshch V, Babaev A, Uzunian A, Slabospitskii S, Kachanov V, Skovpen Y, Radchenko O, Kozyrev A, Dimova T, Blinov V, Volkov P, Savrin V, Perfilov M, Klyukhin V, Gribushin A, Ershov A, Dudko L, Dubinin M, Bunichev V, Boos E, Terkulov A, Kirakosyan M, Azarkin M, Andreev V, Polikarpov S, Chistov R, Chadeeva M, Zhokin A, Popov V, Lychkovskaya N, Gavrilov V, Ivanov K, Aushev T, Vorobyev A, Uvarov L, Sulimov V, Sosnov D, Oreshkin V, Murzin V, Kim V, Ivanov Y, Golovtcov V, Gavrilov G, Toropin A, Tlisova I, Krasnikov N, Kirsanov M, Kirpichnikov D, Karneyeu A, Golubev N, Gninenko S, Dermenev A, Andreev YU, Zhizhin I, Zarubin A, Yuldashev BS, Voytishin N, Teryaev O, Smirnov V, Shulha S, Shmatov S, Shalaev V, Savina M, Perelygin V, Palichik V, Nikitenko A, Matveev V, Malakhov A, Lanev A, Korenkov V, Kodolova O, Karjavine V, Gorbunov I, Golutvin I, Budkouski D, Alexakhin V, Afanasiev S, Warden A, Vetens W, Tsoi HF, Teague D, Smith WH, Sharma V, Shang V, Savin A, Pinna D, Pétré L, Parida G, Mondal S, Mohammadi A, Mallampalli A, Madhusudanan Sreekala J, Loveless R, Lanaro A, Koraka CK, Herve A, Herndon M, He H, Galloni Cet al., 2025,

    Development of systematic uncertainty-aware neural network trainings for binned-likelihood analyses at the LHC

    , European Physical Journal C, Vol: 85, ISSN: 1434-6044

    We propose a neural network training method capable of accounting for the effects of systematic variations of the data model in the training process and describe its extension towards neural network multiclass classification. The procedure is evaluated on the realistic case of the measurement of Higgs boson production via gluon fusion and vector boson fusion in the ττ decay channel at the CMS experiment. The neural network output functions are used to infer the signal strengths for inclusive production of Higgs bosons as well as for their production via gluon fusion and vector boson fusion. We observe improvements of 12 and 16% in the uncertainty in the signal strengths for gluon and vector-boson fusion, respectively, compared with a conventional neural network training based on cross-entropy.
  • Journal article
    Zwalinski L, Zou W, Zormpa O, Zorbas TG, Zoch K, Zoccoli A, Živković L, Ziolkowski M, Zinsser J, Zimine NI, Zhukov K, Zhuang X, Zhu Y, Zhu Y, Zhu X, Zhu J, Zhu CG, Zhou Y, Zhou Y, Zhou Y, Zhou N, Zhou H, Zhou B, Zhong D, Zheng Z, Zheng X, Zheng K, Zheng J, Zhemchugov A, Zhao Z, Zhao Z, Zhao Y, Zhao T, Zhao H, Zhang Z, Zhang Z, Zhang Z, Zhang Y, Zhang Y, Zhang Y, Zhang X, Zhang T, Zhang S, Zhang S, Zhang R, Zhang P, Zhang L, Zhang L, Zhang K, Zhang J, Zhang J, Zhang DF, Zhai M, Zerwas D, Zerradi S, Zenz S, Ženiš T, Zenin O, Zenger DT, Zeng JC, Zeng H, Zeitnitz C, Zaplatilek O, Zanzottera R, Zanzi D, Zang J, Zamora Saa JA, Zambito S, Zakareishvili T, Zak ZK, Zaid E, Zahir I, Zabinski B, Zaazoua M, Yue L, Yuan R, Yuan M, Yuan J, Yu Y, Yu C, Young C, Young CJS, Younas S, Yorita K, Yin P, Yildirim TP, Yexley MR, Yeo B, Yeletskikh I, Yeh Y, Ye X, Ye S, Ye J, Ye H, Yao WM, Yang Y, Yang Y, Yang X, Yang X, Yang Tet al., 2025,

    A continuous calibration of the ATLAS flavour-tagging classifiers via optimal transportation maps

    , European Physical Journal C, Vol: 85, ISSN: 1434-6044

    A calibration of the ATLAS flavour-tagging algorithms using a new calibration procedure based on optimal transportation maps is presented. Simultaneous, continuous corrections to the b-jet, c-jet, and light-flavour jet classification probabilities from jet-tagging algorithms in simulation are derived for b-jets using tt¯→eμννbb data. After application of the derived calibration maps, closure between simulation and observation is achieved for jet flavour observables used in ATLAS analyses of Large Hadron Collider (LHC) Run 2 proton-proton collision data. This continuous calibration opens up new possibilities for the future use of jet flavour information in LHC analyses and also serves as a guide for deriving high-dimensional corrections to simulation via transportation maps, an important development for a broad range of inference tasks.
  • Journal article
    Aad G, Abbott B, Abeling K, Abicht NJ, Abidi SH, Aboulhorma A, Abramowicz H, Abreu H, Abulaiti Y, Abusleme Hoffman AC, Acharya BS, Adam Bourdarios C, Adamczyk L, Adamek L, Addepalli SV, Addison MJ, Adelman J, Adiguzel A, Adye T, Affolder AA, Afik Y, Agaras MN, Agarwala J, Aggarwal A, Agheorghiesei C, Ahmad A, Ahmadov F, Ahmed WS, Ahuja S, Ai X, Aielli G, Ait Tamlihat M, Aitbenchikh B, Aizenberg I, Akbiyik M, Åkesson TPA, Akimov AV, Akiyama D, Akolkar NN, Al Khoury K, Alberghi GL, Albert J, Albicocco P, Albouy GL, Alderweireldt S, Aleksa M, Aleksandrov IN, Alexa C, Alexopoulos T, Alfonsi A, Alfonsi F, Algren M, Alhroob M, Ali B, Ali HMJ, Ali S, Alibocus SW, Aliev M, Alimonti G, Alkakhi W, Allaire C, Allbrooke BMM, Allen JF, Allendes Flores CA, Allport PP, Aloisio A, Alonso F, Alpigiani C, Alvarez Estevez M, Alvarez Fernandez A, Alviggi MG, Aly M, Amaral Coutinho Y, Ambler A, Amelung C, Amerl M, Ames CG, Amidei D, Amor Dos Santos SP, Amos KR, Ananiev V, Anastopoulos C, Andeen T, Anders JK, Andrean SY, Andreazza A, Angelidakis S, Angerami A, Anisenkov AV, Annovi A, Antel C, Anthony MT, Antipov E, Antonelli M, Antrim DJA, Anulli F, Aoki M, Aoki T, Aparisi Pozo JA, Aparo MAet al., 2025,

    Erratum: Measurement of the total and differential cross-sections of (Formula Presented.) production in pp collisions at (Formula Presented.) = 13 TeV with the ATLAS detector (Journal of High Energy Physics, (2024), 2024, 5, (131), 10.1007/JHEP05(2024)131)

    , Journal of High Energy Physics, Vol: 2025

    On the original published paper the symbol l was not rendered correctly in following plots: • Figure 4: x-axis names • Figures 5(a)–5(d): region name • Figures 2, 3, 10(a) and 10(b): x-axis and region names The originally published wrong file has been replaced online.
  • Journal article
    Aaij R, Abdelmotteleb ASW, Abellan Beteta C, Abudinén F, Ackernley T, Adefisoye AA, Adeva B, Adinolfi M, Adlarson P, Agapopoulou C, Aidala CA, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Alessio F, Aliouche Z, Alvarez Cartelle P, Amalric R, Amato S, Amey JL, Amhis Y, An L, Anderlini L, Andersson M, Andreianov A, Andreola P, Andreotti M, Andreou D, Anelli A, Ao D, Archilli F, Argenton M, Arguedas Cuendis S, Artamonov A, Artuso M, Aslanides E, Ataíde Da Silva R, Atzeni M, Audurier B, Bacher D, Bachiller Perea I, Bachmann S, Bachmayer M, Back JJ, Baladron Rodriguez P, Balagura V, Balboni A, Baldini W, Balzani L, Bao H, Baptista de Souza Leite J, Barbero Pretel C, Barbetti M, Barbosa IR, Barlow RJ, Barnyakov M, Barsuk S, Barter W, Bartolini M, Bartz J, Basels JM, Bashir S, Bassi G, Batsukh B, Battista PB, Bay A, Beck A, Becker M, Bedeschi F, Bediaga IB, Behling NA, Belin S, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Bernet Andres S, Bertolin A, Betancourt C, Betti F, Bex J, Bezshyiko I, Bhom J, Bieker MS, Biesuz NV, Billoir P, Biolchini A, Birch M, Bishop FCR, Bitadze A, Bizzeti A, Blake T, Blanc F, Blank JEet al., 2025,

    Coherent photoproduction of ρ0, ω and excited vector mesons in ultraperipheral PbPb collisions

    , Journal of High Energy Physics, Vol: 2025

    The invariant-mass distribution for the coherent photoproduction of dipions in ultraperipheral PbPb collisions is measured using data, corresponding to an integrated luminosity of 224.6 ± 9.6μb<sup>−1</sup>, collected by the LHCb experiment in 2018 at a nucleon-nucleon centre-of-mass energy sNN=5.02 TeV. In the mass range from 400 to 1200 MeV, the results are consistent with previous experiments, with the spectrum dominated by the ρ<sup>0</sup> meson, which interferes with a nonresonant component, together with a smaller ω meson contribution. In an extended mass range up to 2300 MeV, models previously used do not fit the data and a consistent description requires the introduction of two resonances at masses of 1350 ± 20 MeV and 1790 ± 20 MeV with widths of about 300 MeV. The cross-section for each meson is measured differentially in twelve bins of rapidity from 2.05 to 4.90. The ρ<sup>0</sup> cross-section increases with rapidity from about 400 to 600 mb and is measured with a typical precision of 8%, while the cross-section times branching fraction for the ω, ρ′ and ρ′′, with the statistical precision of the data, do not have a pronounced rapidity dependence and are between 0.5 and 1.5mb, with uncertainties up to 30%. A large nuclear suppression is observed for the ρ<sup>0</sup> meson compared to expectations based on photoproduction on the proton that use the impulse approximation. Significant suppression is also observed compared to that predicted by elastic scattering described in the Glauber approach, or with the addition of inelastic scattering in a Gribov-Glauber model.
  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Van Laer T, Van Mechelen P, Breugelmans N, D'Hondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Jaramillo J, Khalilzadeh A, Khan FA, Lee K, Malara A, Paredes S, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Hong Y, Knolle J, Lambrecht L, Marckx D, Mota Amarilo K, Skovpen K, Van Den Bossche N, van der Linden J, Wezenbeek L, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Alves GA, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Laux Kuhn T, Macedo M, Martins J, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Fernandez Perez Tomei TR, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Laroze D, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Carvalho Antunes De Oliveira A, Deng S, Guo B, Jiang C, Levin Aet al., 2025,

    Performance of heavy-flavour jet identification in Lorentz-boosted topologies in proton-proton collisions at √( <i>s</i> ) = 13 TeV

    , Journal of Instrumentation, Vol: 20, Pages: P11006-P11006

    <jats:title>Abstract</jats:title> <jats:p> Measurements in the highly Lorentz-boosted regime provoke increased interest in probing the Higgs boson properties and in searching for particles beyond the standard model at the LHC. In the CMS Collaboration, various boosted-object tagging algorithms, designed to identify hadronic jets originating from a massive particle decaying to bb̅ or cc̅, have been developed and deployed across a range of physics analyses. This paper highlights their performance on simulated events, and summarizes novel calibration techniques using proton-proton collision data collected at √( <jats:italic>s</jats:italic> ) = 13 TeV during the 2016–2018 LHC data-taking period. Three dedicated methods are used for the calibration in multijet events, leveraging either machine learning techniques, the presence of muons within energetic boosted jets, or the reconstruction of hadronically decaying high-energy Z bosons. The calibration results, obtained through a combination of these approaches, are presented and discussed. </jats:p>
  • Journal article
    Aaij R, Abdelmotteleb ASW, Abellan Beteta C, Abudinén F, Ackernley T, Adefisoye AA, Adeva B, Adinolfi M, Adlarson P, Agapopoulou C, Aidala CA, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Aleksiejunas R, Alessio F, Alvarez Cartelle P, Amalric R, Amato S, Amey JL, Amhis Y, An L, Anderlini L, Andersson M, Andreola P, Andreotti M, Andres Estrada S, Anelli A, Ao D, Archilli F, Areg Z, Argenton M, Arguedas Cuendis S, Artamonov A, Artuso M, Aslanides E, Ataíde Da Silva R, Atzeni M, Audurier B, Authier JA, Bacher D, Bachiller Perea I, Bachmann S, Bachmayer M, Back JJ, Baladron Rodriguez P, Balagura V, Balboni A, Baldini W, Baldwin Z, Balzani L, Bao H, Baptista de Souza Leite J, Barbero Pretel C, Barbetti M, Barbosa IR, Barlow RJ, Barnyakov M, Barsuk S, Barter W, Bartz J, Bashir S, Batsukh B, Battista PB, Bay A, Beck A, Becker M, Bedeschi F, Bediaga IB, Behling NA, Belin S, Bellavista A, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Bernet Andres S, Bertolin A, Betancourt C, Betti F, Bex J, Bezshyiko I, Bezshyyko O, Bhom J, Bieker MS, Biesuz NV, Billoir P, Biolchini A, Birch M, Bishop FCR, Bitadze A, Bizzeti A, Blake T, Blanc Fet al., 2025,

    Inclusive B-meson flavour-tagging algorithm at LHCb

    , Journal of High Energy Physics, Vol: 2025

    A new algorithm is developed to identify the flavour of neutral B mesons at production in pp collisions by utilising all tracks from the hadronisation process. The algorithm is calibrated separately for B<sup>0</sup> and Bs0 mesons using B<sup>0</sup> → J/ψK<sup>+</sup>π<sup>−</sup> and Bs0→Ds−π+ decays from pp collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV. This new algorithm improves the tagging power by 35% for B<sup>0</sup> mesons and 20% for Bs0 mesons when compared to the combined performance of the existing LHCb flavour-tagging algorithms.
  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Van Laer T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Lentdecker G, Evard H, Favart L, Gianneios P, Jaramillo J, Khalilzadeh A, Khan FA, Lee K, Mahdavikhorrami M, Malara A, Paredes S, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Hong Y, Knolle J, Lambrecht L, Marckx D, Amarilo KM, Samalan A, Skovpen K, Van Den Bossche N, van der Linden J, Wezenbeek L, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Wertz S, Alves GA, Alves Gallo Pereira M, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Moraes A, Rebello Teles P, Soeiro M, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Macedo M, Martins J, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Fernandez Perez Tomei TR, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Laroze D, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Yi K, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Deng S, Guo B, Jiang C, Levin A, Li C, Li Q Met al., 2025,

    Study of same-sign W boson scattering and anomalous couplings in events with one tau lepton from pp collisions at $$\sqrt{s}=13$$ TeV

    , Journal of High Energy Physics, Vol: 2025

    <jats:title> A <jats:sc>bstract</jats:sc> </jats:title> <jats:p> A first study is presented of the cross section for the scattering of same-sign W boson pairs via the detection of a <jats:italic>τ</jats:italic> lepton. The data from proton-proton collisions at the center-of-mass energy of 13 TeV were collected by the CMS detector at the LHC, and correspond to an integrated luminosity of 138 fb <jats:sup>−1</jats:sup> . Events were selected that contain two jets with large pseudorapidity and large invariant mass, one <jats:italic>τ</jats:italic> lepton, one light lepton (e or <jats:italic>μ</jats:italic> ), and significant missing transverse momentum. The measured cross section for electroweak same-sign WW scattering is <jats:inline-formula> <jats:tex-math>$${1.44}_{-0.56}^{+0.63}$$</jats:tex-math> </jats:inline-formula> times the standard model prediction. In addition, a search is presented for the indirect effects of processes beyond the standard model via the effective field theory framework, in terms of dimension-6 and dimension-8 operators. </jats:p>
  • Journal article
    Abe K, Abe S, Akutsu R, Alarakia-Charles H, Alj Hakim YI, Alonso Monsalve S, Anthony L, Aoki S, Apte KA, Arai T, Arihara T, Arimoto S, Ashida Y, Atkin ET, Babu N, Baranov V, Barker GJ, Barr G, Barrow D, Bates P, Bathe-Peters L, Batkiewicz-Kwasniak M, Baudis N, Berardi V, Berns L, Bhattacharjee S, Blanchet A, Blondel A, Bolognesi S, Bordoni S, Boyd SB, Bronner C, Bubak A, Buizza Avanzini M, Caballero JA, Cadoux F, Calabria NF, Cao S, Cap S, Carabadjac D, Cartwright SL, Casado MP, Catanesi MG, Chakrani J, Chalumeau A, Chvirova A, Collazuol G, Cormier F, Craplet AAL, Cudd A, D'ago D, Dalmazzone C, Daret T, Dasgupta P, Davis C, Davydov YI, De Rosa G, Dealtry T, Densham C, Dergacheva A, Dharmapal Banerjee R, Di Lodovico F, Diaz Lopez G, Dolan S, Douqa D, Doyle TA, Drapier O, Duffy KE, Dumarchez J, Dunne P, Dygnarowicz K, Eguchi A, Elias J, Emery-Schrenk S, Erofeev G, Ershova A, Eurin G, Fedorova D, Fedotov S, Feltre M, Feng L, Ferlewicz D, Finch AJ, Fitton MD, Forza C, Friend M, Fujii Y, Fukuda Y, Furui Y, García-Marcos J, Germer AC, Giannessi L, Giganti C, Glagolev V, Gonin M, González Jiménez R, González Rosa J, Goodman EAG, Gorshanov K, Govindaraj P, Grassi M, Guigue M, Guo FY, Hadley DR, Han S, Harris DA, Harris RJ, Hasegawa T, Hasnip CM, Hassani S, Hastings NC, Hayato Y, Heitkamp I, Henaff D, Hino Y, Holeczek J, Holin A, Holvey T, Hong Van NT, Honjo T, Hooft MCF, Hosokawa K, Hu J, Ichikawa AK, Ieki K, Ikeda M, Ishida T, Ishitsuka M, Izmaylov A, Jachowicz N, Jenkins SJ, Jesús-Valls C, Jia M, Jiang JJ, Ji JY, Jones TP, Jonsson P, Joshi S, Kabirnezhad M, Kaboth AC, Kakuno H, Kameda J, Karpova S, Kasturi VS, Kataoka Y, Katori T, Kawamura Y, Kawaue M, Kearns E, Khabibullin M, Khotjantsev A, Kikawa T, King S, Kiseeva V, Kisiel J, Klustová A, Kneale L, Kobayashi H, Koch L, Kodama S, Kolupanova M, Konaka A, Kormos LL, Koshio Y, Kowalik K, Kudenko Y, Kudo Y, Kumar Jha A, Kurjata R, Kurochka V, Kutter T, Labarga L, Lachat M, Lachner K, Lagoda J, Lakshmi SM, Lamers James M, Laet al., 2025,

    First Differential Measurement of the Single π^{+} Production Cross Section in Neutrino Neutral-Current Scattering.

    , Phys Rev Lett, Vol: 135

    Since its first observation in the 1970s, neutrino-induced neutral-current single positive pion production (NC1π^{+}) has remained an elusive and poorly understood interaction channel. This process is a significant background in neutrino oscillation experiments and studying it further is critical for the physics program of next-generation accelerator-based neutrino oscillation experiments. In this Letter, we present the first double-differential cross-section measurement of NC1π^{+} interactions using data from the ND280 detector of the T2K experiment collected in ν-beam mode. The measured flux-averaged integrated cross section is σ=(6.07±1.22)×10^{-41}  cm^{2}/nucleon. We compare the results on a hydrocarbon target to the predictions of several neutrino interaction generators and final-state-interaction models. While model predictions agree with the differential results, the data show a weak preference for a cross-section normalization approximately 30% higher than predicted by most models studied in this Letter.
  • Journal article
    Abubakar S, Acero MA, Acharya B, Adamson P, Anfimov N, Antoshkin A, Arrieta-Diaz E, Asquith L, Aurisano A, Azevedo D, Back A, Balashov N, Baldi P, Bambah BA, Bannister EF, Barros A, Bat A, Bays K, Bernstein R, Bezerra TJC, Bhatnagar V, Bhuyan B, Bian J, Booth AC, Bowles R, Brahma B, Bromberg C, Buchanan N, Butkevich A, Calvez S, Carceller JM, Carroll TJ, Catano-Mur E, Cesar JP, Chirco R, Choudhary BC, Christensen A, Cicala MF, Coan TE, Contreras T, Cooleybeck A, Coveyou D, Cremonesi L, Davies GS, Derwent PF, Ding P, Djurcic Z, Dobbs K, Dolce M, Dueñas Tonguino D, Dukes EC, Dye A, Ehrlich R, Ewart E, Filip P, Frank MJ, Gallagher HR, Giri A, Gomes RA, Goodman MC, Group R, Habig A, Hakl F, Hartnell J, Hatcher R, Hays JM, He M, Heller K, Hewes V, Himmel A, Horoho T, Ivanova A, Jargowsky B, Kakorin I, Kalitkina A, Kaplan DM, Khanam A, Kirezli B, Kleykamp J, Klimov O, Koerner LW, Kolupaeva L, Kralik R, Kumar A, Kuruppu CD, Kus V, Lackey T, Lang K, Lasorak P, Lesmeister J, Lister A, Liu J, Lock JA, MacMahon M, Magill S, Mann WA, Manoharan MT, Manrique Plata M, Marshak ML, Martinez-Casales M, Matveev V, Mehta B, Messier MD, Meyer H, Miao T, Miller WH, Mishra SR, Mohanta R, Moren A, Morozova A, Mu W, Mualem L, Muether M, Mulder K, Myers D, Naples D, Nelleri S, Nelson JK, Nichol R, Niner E, Norman A, Norrick A, Oh H, Olshevskiy A, Olson T, Ozkaynak M, Pal A, Paley J, Panda L, Patterson RB, Pawloski G, Petti R, Plunkett RK, Porter JCC, Prais LR, Rafique A, Raj V, Rajaoalisoa M, Ramson B, Rebel B, Robles E, Roy P, Samoylov O, Sanchez MC, Sánchez Falero S, Shanahan P, Sharma P, Sheshukov A, Shivam, Shmakov A, Shorrock W, Shukla S, Singh I, Singh P, Singh V, Singh Chhibra S, Singha DK, Smith A, Smolik J, Snopok P, Solomey N, Sousa A, Soustruznik K, Strait M, Suter L, Sutton A, Swain S, Sweeney C, Sztuc A, Talukdar N, Tas P, Thakore T, Thomas J, Tiras E, Titus M, Torun Y, Tran D, Trokan-Tenorio J, Urheim J, Vahle P, Vallari Z, Vockerodt KJ, Waldron AV, Wallbank M, Warburton TK Wet al., 2025,

    Joint neutrino oscillation analysis from the T2K and NOvA experiments

    , Nature, Vol: 646, Pages: 818-824, ISSN: 0028-0836

    The landmark discovery that neutrinos have mass and can change type (or flavour) as they propagate—a process called neutrino oscillation1,2,3,4,5,6—has opened up a rich array of theoretical and experimental questions being actively pursued today. Neutrino oscillation remains the most powerful experimental tool for addressing many of these questions, including whether neutrinos violate charge-parity (CP) symmetry, which has possible connections to the unexplained preponderance of matter over antimatter in the Universe7,8,9,10,11. Oscillation measurements also probe the mass-squared differences between the different neutrino mass states (Δm2), whether there are two light states and a heavier one (normal ordering) or vice versa (inverted ordering), and the structure of neutrino mass and flavour mixing12. Here we carry out the first joint analysis of datasets from NOvA13 and T2K14, the two currently operating long-baseline neutrino oscillation experiments (hundreds of kilometres of neutrino travel distance), taking advantage of our complementary experimental designs and setting new constraints on several neutrino sector parameters. This analysis provides new precision on the
  • Journal article
    Abe K, Abe S, Akutsu R, Alarakia-Charles H, Hakim YIA, Monsalve SA, Anthony L, Aoki S, Apte KA, Arai T, Arihara T, Arimoto S, Ashida Y, Atkin ET, Babu N, Baranov V, Barker GJ, Barr G, Barrow D, Bates P, Bathe-Peters L, Batkiewicz-Kwasniak M, Baudis N, Berardi V, Berns L, Bhattacharjee S, Blanchet A, Blondel A, Bolognesi S, Bordoni S, Boyd SB, Bronner C, Bubak A, Avanzini MB, Caballero JA, Cadoux F, Calabria NF, Cao S, Cap S, Carabadjac D, Cartwright SL, Casado MP, Catanesi MG, Chakrani J, Chalumeau A, Chvirova A, Collazuol G, Cormier F, Craplet AAL, Cudd A, Dago D, Dalmazzone C, Daret T, Dasgupta P, Davis C, Davydov YI, De Rosa G, Dealtry T, Densham C, Dergacheva A, Banerjee RD, Di Lodovico F, Lopez GD, Dolan S, Douqa D, Doyle TA, Drapier O, Duffy KE, Dumarchez J, Dunne P, Dygnarowicz K, Eguchi A, Elias J, Emery-Schrenk S, Erofeev G, Ershova A, Eurin G, Fedorova D, Fedotov S, Feltre M, Feng L, Ferlewicz D, Finch AJ, Fitton MD, Forza C, Friend M, Fujii Y, Fukuda Y, Furui Y, García-Marcos J, Germer AC, Giannessi L, Giganti C, Glagolev V, Gonin M, Jiménez RG, Rosa JG, Goodman EAG, Gorshanov K, Govindaraj Pet al., 2025,

    Signal selection and model-independent extraction of the neutrino neutral-current single π+ cross section with the T2K experiment

    , Physical Review D, Vol: 112, ISSN: 2470-0010

    This article presents a study of single π<sup>+</sup> production in neutrino neutral-current interactions (NC1π<sup>+</sup>) using the FGD1 hydrocarbon target of the ND280 detector of the T2K experiment. We report the largest sample of such events selected by any experiment, providing the first new data for this channel in over four decades and the first using a sub-GeV neutrino flux. The signal selection strategy and its performance are detailed together with validations of a robust cross section extraction methodology. The measured fluxaveraged integrated cross-section is σ = (6.07 ± 1.22) × 10<sup>−41</sup> cm<sup>2</sup>/nucleon, 1.3σ above the NEUT v5.4.0 expectation.
  • Journal article
    Ahmed A, Sharma J, Bhattacharya A, Biswas A, Singha T, Mudryk Y, Alam A, Das Iet al., 2025,

    Unconventional Anomalous Hall Effect in Hexagonal Polar Magnet Y3Co8Sn4

    , Advanced Functional Materials, Vol: 35, ISSN: 1616-301X

    A rare realization of unconventional anomalous Hall effect (UAHE) both below and above the magnetic transition temperature (T<inf>C</inf>) in a hexagonal noncentrosymmetric magnet Y<inf>3</inf>Co<inf>8</inf>Sn<inf>4</inf>, using a combined experimental and ab initio calculations. Occurrence of such UAHE is mainly attributed to the reciprocal ((Formula presented.)) topology (i.e., the presence of topological Weyl points at/near the Fermi level), along with some contribution from the topological magnetic texture (at low temperatures), as inferred from the measured field-dependent ac susceptibility. The effect of UAHE on the measured transport behavior however evolves differently with temperature above and below T<inf>C</inf> = 53 K, suggesting different physical mechanism responsible in the two phases. A unique planar ferrimagnetic ordering is found to be the most stable state with ab-plane as the easy plane below T<inf>C</inf>. The simulated net magnetization and the moment per Co atom agrees fairly well with the experimentally measured values. A reasonably large anomalous Hall conductivity (AHC) is also observed in both the phases (above and below T<inf>C</inf>) of the present compound, which is again not so ubiquitous. The results underscore the family of R<inf>3</inf>Co<inf>8</inf>Sn<inf>4</inf> (R = rare earth) polar magnets as a compelling backdrop for exploring the synergy of magnetism and topological non-trivial electronic states, pivotal for spintronic applications.
  • Journal article
    Chatterjee S, Das I, 2025,

    Tuning colossal magnetoresistance through A-site ionic radius in polycrystalline Gd0.5Ca0.5−xSrxMnO3 (x = 0.0-0.5) systems

    , Journal of Applied Physics, Vol: 138, ISSN: 0021-8979

    The magnetotransport properties of polycrystalline Gd 0.5 Ca 0.5 − x Sr x MnO 3 systems reveal a significant enhancement in magnetoresistance with increasing A-site ionic radius, transitioning from “Ca” to “Sr.” Notably, Gd 0.5 Ca 0.5 MnO 3 exhibits only a weak magnetoresistance, while complete substitution of Ca 2 + with the larger Sr 2 + ion in Gd 0.5 Sr 0.5 MnO 3 results in a striking colossal magnetoresistance. This contrasting behavior highlights the critical role of the A-site divalent cation size in modulating the electronic bandwidth, suppressing charge-orbital ordering, and governing the interplay between competing magnetic and electronic ground states. Materials exhibiting such large magnetoresistance are of great interest for various spintronic applications. In polycrystalline Gd 0.5 Sr 0.5 MnO 3 (GSMO), an exceptionally high magnetoresistance of 10 9 % is observed at 10 K under a 70 kOe magnetic field, significantly exceeding the values reported for single-crystalline GSMO under similar conditions. Although all studied samples exhibit charge ordering, colossal magnetoresistance is exclusive to GSMO. This phenomenon can be attributed to a magnetic-field-induced transition from a charge-ordered antiferromagnetic insulating state to a ferromagnetic metallic state.
  • Journal article
    Aaij R, Abdelmotteleb ASW, Abellan Beteta C, Abudinén F, Ackernley T, Adefisoye AA, Adeva B, Adinolfi M, Adlarson P, Agapopoulou C, Aidala CA, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Alessio F, Alexander M, Aliouche Z, Alvarez Cartelle P, Amalric R, Amato S, Amey JL, Amhis Y, An L, Anderlini L, Andersson M, Andreianov A, Andreola P, Andreotti M, Andreou D, Anelli A, Ao D, Archilli F, Argenton M, Arguedas Cuendis S, Artamonov A, Artuso M, Aslanides E, Ataíde Da Silva R, Atzeni M, Audurier B, Bacher D, Bachiller Perea I, Bachmann S, Bachmayer M, Back JJ, Baladron Rodriguez P, Balagura V, Balboni A, Baldini W, Balzani L, Bao H, Baptista de Souza Leite J, Barbero Pretel C, Barbetti M, Barbosa IR, Barlow RJ, Barnyakov M, Barsuk S, Barter W, Bartz J, Basels JM, Bashir S, Batsukh B, Battista PB, Bay A, Beck A, Becker M, Bedeschi F, Bediaga IB, Behling NA, Belin S, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Bernet Andres S, Bertolin A, Betancourt C, Betti F, Bex J, Bezshyiko I, Bezshyyko O, Bhom J, Bieker MS, Biesuz NV, Billoir P, Biolchini A, Birch M, Bishop FCR, Bitadze A, Bizzeti A, Blake T, Blanc F, Blank JE, Blusk S, Bocharnikov V, Boelhauve JA, Boente Garcia O, Boettcher T, Bohare A, Boldyrev A, Bolognani CS, Bolzonella R, Bonacci RB, Bondar N, Bordelius A, Borgato F, Borghi S, Borsato M, Borsuk JT, Bottalico E, Bouchiba SA, Bovill M, Bowcock TJV, Boyer A, Bozzi C, Brandenburg JD, Brea Rodriguez A, Breer N, Brodzicka J, Brossa Gonzalo A, Brown J, Brundu D, Buchanan E, Buonincontri L, Burgos Marcos M, Burke AT, Burr C, Butter JS, Buytaert J, Byczynski W, Cadeddu S, Cai H, Caillet A, Calabrese R, Calderon Ramirez S, Calefice L, Cali S, Calvi M, Calvo Gomez M, Camargo Magalhaes P, Cambon Bouzas JI, Campana P, Campora Perez DH, Campoverde Quezada AF, Capelli S, Capriotti L, Caravaca-Mora R, Carbone A, Carcedo Salgado L, Cardinale R, Cardini A, Carniti P, Carus L, Casais Vidal A, Caspary R, Casse G, Cattaneo M Cet al., 2025,

    Observation of a New Charmed Baryon Decaying to Ξ_{c}^{+}π^{-}π^{+}.

    , Phys Rev Lett, Vol: 135

    The Ξ_{c}^{+}π^{-}π^{+} spectrum is investigated using proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4  fb^{-1}, collected by the LHCb experiment during 2016-2018. Four states are observed with high significance, and their masses and widths are measured to be m[Ξ_{c}(2815)^{+}]=2816.65±0.03±0.03±0.23  MeV, Γ[Ξ_{c}(2815)^{+}]=2.07±0.08±0.12  MeV, m[Ξ_{c}(2923)^{+}]=2922.8±0.3±0.5±0.2  MeV, Γ[Ξ_{c}(2923)^{+}]=5.3±0.9±1.4  MeV, m[Ξ_{c}(2970)^{+}]=2968.6±0.5±0.5±0.2  MeV, Γ[Ξ_{c}(2970)^{+}]=31.7±1.7±1.9  MeV, [Ξ_{c}(3080)^{+}]=3076.8±0.7±1.3±0.2  MeV, Γ[Ξ_{c}(3080)^{+}]=6.8±2.3±0.9  MeV, where the uncertainties are statistical, systematic, and due to the limited precision on the Ξ_{c}^{+} mass, respectively. The Ξ_{c}(2923)^{+} baryon is observed for the first time, and is consistent with being the isospin partner of the previously observed Ξ_{c}(2923)^{0} state. Most of the measured parameters are more precise than existing world averages.
  • Journal article
    Aaij R, Abdelmotteleb ASW, Abellan Beteta C, Abudinén F, Ackernley T, Adefisoye AA, Adeva B, Adinolfi M, Adlarson P, Agapopoulou C, Aidala CA, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Alessio F, Aliouche Z, Alvarez Cartelle P, Amalric R, Amato S, Amey JL, Amhis Y, An L, Anderlini L, Andersson M, Andreola P, Andreotti M, Anelli A, Ao D, Archilli F, Areg Z, Argenton M, Arguedas Cuendis S, Artamonov A, Artuso M, Aslanides E, Ataíde Da Silva R, Atzeni M, Audurier B, Bacher D, Bachiller Perea I, Bachmann S, Bachmayer M, Back JJ, Baladron Rodriguez P, Balagura V, Balboni A, Baldini W, Balzani L, Bao H, Baptista de Souza Leite J, Barbero Pretel C, Barbetti M, Barbosa IR, Barlow RJ, Barnyakov M, Barsuk S, Barter W, Bartz J, Bashir S, Batsukh B, Battista PB, Bay A, Beck A, Becker M, Bedeschi F, Bediaga IB, Behling NA, Belin S, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Bernet Andres S, Bertolin A, Betancourt C, Betti F, Bex J, Bezshyiko I, Bezshyyko O, Bhom J, Bieker MS, Biesuz NV, Billoir P, Biolchini A, Birch M, Bishop FCR, Bitadze A, Bizzeti A, Blake T, Blanc F, Blank JE, Blusk S, Bocharnikov V, Boelhauve JA, Boente Garcia O, Boettcher T, Bohare A, Boldyrev A, Bolognani CS, Bolzonella R, Bonacci RB, Bondar N, Bordelius A, Borgato F, Borghi S, Borsato M, Borsuk JT, Bottalico E, Bouchiba SA, Bovill M, Bowcock TJV, Boyer A, Bozzi C, Brandenburg JD, Brea Rodriguez A, Breer N, Brodzicka J, Brossa Gonzalo A, Brown J, Brundu D, Buchanan E, Buonincontri L, Burgos Marcos M, Burke AT, Burr C, Butter JS, Buytaert J, Byczynski W, Cadeddu S, Cai H, Caillet A, Calabrese R, Calderon Ramirez S, Calefice L, Cali S, Calvi M, Calvo Gomez M, Camargo Magalhaes P, Cambon Bouzas JI, Campana P, Campora Perez DH, Campoverde Quezada AF, Capelli S, Capriotti L, Caravaca-Mora R, Carbone A, Carcedo Salgado L, Cardinale R, Cardini A, Carniti P, Carus L, Casais Vidal A, Caspary R, Casse G, Cattaneo M, Cavallero G, Cavallini V, Celani S, Cesareet al., 2025,

    Measurement of the Z-Boson Mass.

    , Phys Rev Lett, Vol: 135

    The first dedicated Z-boson mass measurement at the LHC with Z→μ^{+}μ^{-} decays is reported. The dataset uses proton-proton collisions at a center-of-mass energy of 13 TeV, recorded in 2016 by the LHCb experiment, and corresponds to an integrated luminosity of 1.7  fb^{-1}. A template fit to the μ^{+}μ^{-} mass distribution yields the following result for the Z-boson mass: m_{Z}=91,185.7±8.3±3.9  MeV, where the first uncertainty is statistical and the second systematic. This result is consistent with previous measurements and predictions from global electroweak fits.
  • Journal article
    Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Kwon H, Van Laer T, Van Mechelen P, Breugelmans N, D'Hondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Malara A, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Skovpen K, Van Den Bossche N, van der Linden J, Vandenbroeck J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Turkcapar S, Alves GA, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Laux Kuhn T, Macedo M, Mota Amarilo K, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Tomei TRFP, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Laroze D, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Carvalho Antunes De Oliveira A, Denet al., 2025,

    Search for the Rare Decay D^{0}→μ^{+}μ^{-} in Proton-Proton Collisions at sqrt[s]=13.6  TeV.

    , Phys Rev Lett, Vol: 135

    A search for the rare decay D^{0}→μ^{+}μ^{-} is reported using proton-proton collision events at sqrt[s]=13.6  TeV collected by the CMS detector in 2022-2023, corresponding to an integrated luminosity of 64.5  fb^{-1}. This is the first analysis to use a newly developed inclusive dimuon trigger, expanding the scope of the CMS flavor physics program. The search uses D^{0} mesons obtained from D^{*+}→D^{0}π^{+} decays. No significant excess is observed. A limit on the branching fraction of B(D^{0}→μ^{+}μ^{-})<2.4×10^{-9} at 95% confidence level is set. This is the most stringent upper limit set on any flavor changing neutral current decay in the charm sector.
  • Journal article
    Abe K, Abe S, Akutsu R, Alarakia-Charles H, Alj Hakim YI, Alonso Monsalve S, Anthony L, Aoki S, Apte KA, Arai T, Arihara T, Arimoto S, Ashida Y, Atkin ET, Babu N, Baranov V, Barker GJ, Barr G, Barrow D, Bates P, Bathe-Peters L, Batkiewicz-Kwasniak M, Baudis N, Berardi V, Berns L, Bhattacharjee S, Blanchet A, Blondel A, Boistier PMM, Bolognesi S, Bordoni S, Boyd SB, Bronner C, Bubak A, Buizza Avanzini M, Caballero JA, Cadoux F, Calabria NF, Cao S, Cap S, Carabadjac D, Cartwright SL, Casado MP, Catanesi MG, Chakrani J, Chalumeau A, Cherdack D, Chvirova A, Coleman J, Collazuol G, Cormier F, Craplet AAL, Cudd A, Dago D, Dalmazzone C, Daret T, Dasgupta P, Davis C, Davydov YI, de Perio P, De Rosa G, Dealtry T, Densham C, Dergacheva A, Dharmapal Banerjee R, Di Lodovico F, Diaz Lopez G, Dolan S, Douqa D, Doyle TA, Drapier O, Duffy KE, Dumarchez J, Dunne P, Dygnarowicz K, Eguchi A, Elias J, Emery-Schrenk S, Erofeev G, Ershova A, Eurin G, Fedorova D, Fedotov S, Feltre M, Feng L, Ferlewicz D, Finch AJ, Fitton MD, Forza C, Friend M, Fujii Y, Fukuda Y, Furui Y, García-Marcos J, Germer AC, Giannessi L, Giganti C, Girgus M, Glagolev V, Gonin M, González Jiménez R, González Rosa J, Goodman EAG, Gorshanov K, Govindaraj P, Grassi M, Guigue M, Guo FY, Hadley DR, Han S, Harris DA, Harris RJ, Hasegawa T, Hasnip CM, Hassani S, Hastings NC, Hayato Y, Heitkamp I, Henaff D, Hino Y, Holeczek J, Holin A, Holvey T, Hong Van NT, Honjo T, Hooft MCF, Hosokawa K, Hu J, Ichikawa AK, Ieki K, Ikeda M, Ishida T, Ishitsuka M, Ito H, Ito S, Izmaylov A, Jachowicz N, Jenkins SJ, Jesús-Valls C, Jia M, Jiang JJ, Ji JY, Jones TP, Jonsson P, Joshi S, Kabirnezhad M, Kaboth AC, Kakuno H, Kameda J, Karpova S, Kasturi VS, Kataoka Y, Katori T, Kawabata A, Kawamura Y, Kawaue M, Kearns E, Khabibullin M, Khotjantsev A, Kikawa T, King S, Kiseeva V, Kisiel J, Klustová A, Kneale L, Kobayashi H, Koch L, Kodama S, Kolupanova M, Konaka A, Kormos LL, Koshio Y, Kowalik K, Kudenko Y, Kudo Y, Kumar Jha A, Kurjata R, Kurochkaet al., 2025,

    First measurement of the electron-neutrino charged-current pion production cross section on carbon with the T2K near detector

    , Physical Review Letters, Vol: 135, ISSN: 0031-9007

    The T2K Collaboration presents the first measurement of electron neutrino-induced charged-current pion production on a predominantly carbon target in a restricted kinematical phase space. This is performed using data from the 2.5° off-axis near detector, ND280. The differential cross sections with respect to the outgoing electron and pion kinematics, in addition to the total flux-integrated cross section, are obtained. Comparisons between the measured and predicted cross-section results using the neut, genie, and nuwro Monte Carlo event generators are presented. The measured total flux-integrated cross section is [2.52±0.52⁢(stat)±0.30⁢(syst)]×10−39  cm2 nucleon−1, which is lower than the event generator predictions.

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