Publications

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

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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, 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, 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, Damas F, 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, 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., 2026,

Simultaneous Probe of the Charm and Bottom Quark Yukawa Couplings Using <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>t</mml:mi> <mml:mover accent="true"> <mml:mi>t</mml:mi> <mml:mo stretchy="false">¯</mml:mo> </mml:mover> <mml:mi>H</mml:mi> </mml:math> Events

, Physical Review Letters, Vol: 136, ISSN: 0031-9007

<jats:p> A search for the standard model Higgs boson decaying to a charm quark-antiquark pair, <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mrow> <a:mi>H</a:mi> <a:mo stretchy="false">→</a:mo> <a:mrow> <a:mi>c</a:mi> <a:mover accent="true"> <a:mrow> <a:mi>c</a:mi> </a:mrow> <a:mrow> <a:mo stretchy="false">¯</a:mo> </a:mrow> </a:mover> </a:mrow> </a:mrow> </a:math> , produced in association with a top quark-antiquark pair ( <f:math xmlns:f="http://www.w3.org/1998/Math/MathML" display="inline"> <f:mrow> <f:mi>t</f:mi> <f:mover accent="true"> <f:mi>t</f:mi> <f:mo stretchy="false">¯</f:mo> </f:mover> </f:mrow> <f:mi>H</f:mi> </f:math> ) is presented. The search is performed with data from proton-proton collisions at <j:math xmlns:j="http://www.w3.org/1998/Math/MathML" display="inline"> <j:msqrt> <j:mi>s</j:mi> </j:m

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, D'ago 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 Met al., 2025,

Results from the T2K Experiment on Neutrino Mixing Including a New Far Detector μ -like Sample

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

We have made improved measurements of three-flavor neutrino mixing with 19.7(16.3)×1020 protons on target in (anti-)neutrino-enhanced beam modes. A new sample of muon-neutrino events with tagged pions has been added at the far detector, as well as new proton and photon-tagged samples at the near detector. Significant improvements have been made to the flux and neutrino interaction modeling. T2K data continue to prefer the normal mass ordering and upper octant of sin2θ23 with a near-maximal value of the charge-parity violating phase with best-fit values in the normal ordering of δCP=-2.18-0.47+1.22, sin2θ23=0.559-0.078+0.018 and Δm322=(+2.506-0.052+0.039)×10-3 eV2.

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Journal article

Chekhovsky V, 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, Sonawane M, Waltenberger W, Wulz CE, 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, 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, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, 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 WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EMet al., 2025,

Observation of Coherent (Formula presented) Meson Photoproduction in Ultraperipheral PbPb Collisions at (Formula presented)

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

The first observation of coherent (Formula presented) meson photoproduction off heavy nuclei is presented using ultraperipheral lead-lead collisions at a center-of-mass energy per nucleon pair of 5.36 TeV. The data were collected by the CMS experiment and correspond to an integrated luminosity of (Formula presented). The (Formula presented) meson signals are reconstructed via the (Formula presented) decay channel. The production cross section is presented as a function of the (Formula presented) meson rapidity in the range (Formula presented), probing gluons that carry a fraction of the nucleon momentum ((Formula presented)) around (Formula presented). The observed cross section exhibits little dependence on rapidity and is significantly suppressed, by a factor of (Formula presented), compared to a baseline model that treats a nucleus as a collection of free nucleons. Theoretical models that incorporate the nuclear shadowing effect generally provide a better description of the (Formula presented) data than those incorporating gluon saturation. This study establishes a powerful new tool for exploring nuclear effects and nuclear gluonic structure in the small-(Formula presented) regime at a unique energy scale bridging the perturbative and nonperturbative quantum chromodynamics domains.

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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, Arata C, Archilli F, Areg Z, Argenton M, Arguedas Cuendis S, Arnone L, Artamonov A, Artuso M, Aslanides E, Da Silva RA, 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, Souza Leite JB, 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 Aet al., 2025,

First Observation of the Charmless Baryonic Decay B+ → Λ ¯ p p ¯ p

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

A search for the charmless baryonic decay B+→Λ¯pp¯p is performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 5.4 fb-1. The branching fraction for this decay is measured for the first time relative to that of the topologically similar decay B+→J/ψK+, with J/ψ→Λ¯pK-. The branching fraction is measured to be B(B+→Λ¯pp¯p)=(2.15±0.35±0.12±0.28)×10-7, where the first uncertainty is statistical, the second is systematic, and the third arises from the uncertainty in the normalization channel branching fraction. The CP asymmetry is measured to be ACP=(5.4±15.6±2.4)%, where the uncertainties are statistical and systematic. The background-subtracted invariant-mass distributions of Λ¯p and p¯p pairs exhibit pronounced enhancements at both kinematic thresholds, in contrast to a uniform phase-space distribution.

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Journal article

Chekhovsky V, 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, 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, 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, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, 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, Jesus SS, 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, Hou Q, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Zhang H, Zhao J, Agapitos A, Ban Y, Carvalho Antunes De Oliveira A, Deng Set al., 2025,

General search for supersymmetric particles in scenarios with compressed mass spectra using 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 general search is presented for supersymmetric particles (sparticles) in scenarios featuring compressed mass spectra using proton-proton collisions at a center-of-mass energy of 13 TeV, recorded with the CMS detector at the LHC. The analyzed data sample corresponds to an integrated luminosity of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mn>138</a:mn> <a:mtext> </a:mtext> <a:mtext> </a:mtext> <a:msup> <a:mi>fb</a:mi> <a:mrow> <a:mo>−</a:mo> <a:mn>1</a:mn> </a:mrow> </a:msup> </a:math> . A wide range of potential sparticle signatures are targeted, including pair production of electroweakinos, sleptons, and top squarks. The search focuses on events with a high transverse momentum system from initial-state-radiation jets recoiling against a potential sparticle system with significant missing transverse momentum. Events are categorized based on their lepton multiplicity, jet multiplicity, number of <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"> <c:mi>b</c:mi> </c:math> -tagged jets, and kinematic variables sensitive to the sparticle masses and mass splittings. The sensitivity extends to higher parent sparticle masses than previously probed at the LHC for production of pairs of electroweakinos, sleptons, and top squarks with mass spectra featuring small mass splittings (compressed mass spectra). The observed results demonstrate agreemen

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, 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, 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, Liaet al., 2025,

Search for a new scalar resonance decaying to a Higgs boson and another new scalar particle in the final state with two bottom quarks and two photons in proton-proton 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 search is presented for a new scalar resonance, X, decaying to a standard model Higgs boson and another new scalar particle, Y, in the final state where the Higgs boson decays to a <jats:inline-formula> <jats:tex-math>$$\text{b}\overline{\text{b} }$$</jats:tex-math> </jats:inline-formula> pair, while the Y particle decays to a pair of photons. The search is performed in the mass range 240–1000 GeV for the resonance X, and in the mass range 70–800 GeV for the particle Y, using proton-proton collision data collected by the CMS experiment at <jats:inline-formula> <jats:tex-math>$$\sqrt{s}=13$$</jats:tex-math> </jats:inline-formula> TeV, corresponding to an integrated luminosity of 132 fb <jats:sup> <jats:italic>−</jats:italic> 1 </jats:sup> . In general, the data are found to be compatible with the standard model expectation. Observed (expected) upper limits at 95% confidence level on the product of the production cross section and the relevant branching fraction are extracted for the X <jats:italic>→</jats:italic> YH process, and are found to be within the range of 0.05–2.69 (0.08–1.94) fb, depending on <jats:italic>m</jats:italic> <jats:sub>X</jats:sub> and <jats:italic>m</jats:italic> <jats:sub>Y</jats:sub> . The most

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

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

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, Benato L, Bergauer T, Dragicevic M, Giordano C, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Matthewman M, Mikulec I, Schieck J, Schofbeck R, Schwarz D, Shooshtari M, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Kwon H, Henao DO, Van Laer T, Van Mechelen P, Bierkens J, Breugelmans N, D'Hondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Kashko P, Lowette S, Makarenko I, Mueller 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, 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 Jeneret JDF, 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, Vilela Pereira A, Alda Junior 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, Kuhn TL, 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, 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, Jiang Cet al., 2025,

Determination of the spin and parity of all-charm tetraquarks

, NATURE, Vol: 648, Pages: 58-+, ISSN: 0028-0836

Cite

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, 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 JEet al., 2025,

Search for the decay B0→ ϕϕ

, Journal of High Energy Physics, Vol: 2025

A search for the decay B0→ ϕϕ is made using pp collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. No significant signal is observed, and an upper limit on the branching fraction of 1.3 (1.4) × 10−8 at 90 (95)% confidence level is set. This result supersedes the previous LHCb study and improves the upper limit by a factor of two.

Abstract
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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.

Abstract
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Citations: 4

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

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

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, Ocampo Henao D, Van Laer T, Van Mechelen P, Bierkens J, Breugelmans N, D'Hondt 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, 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, Liaet al., 2025,

Identification of tau leptons using a convolutional neural network with domain adaptation

, Journal of Instrumentation, Vol: 20, Pages: P12032-P12032

<jats:title>Abstract</jats:title> <jats:p> A tau lepton identification algorithm, <jats:sc>DeepTau</jats:sc> , based on convolutional neural network techniques, has been developed in the CMS experiment to discriminate reconstructed hadronic decays of tau leptons (τ <jats:sub>h</jats:sub> ) from quark or gluon jets and electrons and muons that are misreconstructed as τ <jats:sub>h</jats:sub> candidates. The latest version of this algorithm, v2.5, includes domain adaptation by backpropagation, a technique that reduces discrepancies between collision data and simulation in the region with the highest purity of genuine τ <jats:sub>h</jats:sub> candidates. Additionally, a refined training workflow improves classification performance with respect to the previous version of the algorithm, with a reduction of 30–50% in the probability for quark and gluon jets to be misidentified as τ <jats:sub>h</jats:sub> candidates for given reconstruction and identification efficiencies. This paper presents the novel improvements introduced in the <jats:sc>DeepTau</jats:sc> algorithm and evaluates its performance in LHC proton-proton collision data at √( <jats:italic>s</jats:italic> ) = 13 and 13.6 TeV collected in 2018 and 2022 with integrated luminosities of 60 and 35 fb <jats:sup>-1</jats:sup> , respectively. Techniques to calibrate the performance of the τ <jats:sub>h</jats:sub> identification algorithm in simulation with respect

Journal article

Hall G, 2025,

The evolution of particle physics electronics

, JOURNAL OF INSTRUMENTATION, Vol: 20

Cite

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>| <</jats:italic> 38 <jats:italic>.</jats:italic> 1 ( <jats:italic>|κ</jats:italic> <jats:sub>c</jats:sub> <jats:italic>| <</jats:italic> 72 <jats:italic>.</jats:italic> 5) at 95% confidence level. </jats:p>

Journal article

Yamauchi K, Abe K, Abe S, Asaoka Y, Harada M, Hayato Y, Hiraide K, Hosokawa K, Ieki K, Ikeda M, Kameda J, Kanemura Y, Kataoka Y, Miki S, Mine S, Miura M, Moriyama S, Nakahata M, Nakayama S, Noguchi Y, Pronost G, Sato K, Sekiya H, Shimizu K, Shinoda R, Shiozawa M, Suzuki Y, Takeda A, Takemoto Y, Tanaka H, Yano T, Itow Y, Kajita T, Nishijima R, Okumura K, Tashiro T, Tomiya T, Wang X, Fernandez P, Labarga L, Samudio D, Zaldivar B, Pointon BW, Yanagisawa C, Kearns E, Mirabito J, Wan L, Wester T, Bian J, Cortez B, Griskevich NJ, Jiang Y, Smy MB, Sobel HW, Takhistov V, Yankelevich A, Hill J, Jang MC, Lee SH, Moon DH, Park RG, Yang BS, Bodur B, Scholberg K, Walter CW, Beauchêne A, Drapier O, Ershova A, Mueller TA, Santos AD, Paganini P, Quach C, Rogly R, Nakamura T, Jang JS, Litchfield RP, Machado LN, Soler FJP, Learned JG, Choi K, Iovine N, Tiwari D, Cao S, Anthony LHV, Martin D, Prouse NW, Scott M, Uchida Y, Berardi V, Calabria NF, Catanesi MG, Ospina N, Radicioni E, Langella A, De Rosa G, Collazuol G, Feltre M, Mattiazzi M, Ludovici L, Gonin Met al., 2025,

Search for neutron decay into an antineutrino and a neutral kaon in 0.401 megaton-years exposure of Super-Kamiokande

, Physical Review D, Vol: 112, Pages: 1-13, ISSN: 2470-0010

We searched for bound neutron decay via n → ν̄ + K0 predicted by the grand unified theories in 0.401 Mton · years exposure of all pure water phases in the Super-Kamiokande detector. About 4.4 times more data than in the previous search have been analyzed by a new method including a spectrum fit to kaon invariant mass distributions. No significant data excess has been observed in the signal regions. As a result of this analysis, we set a lower limit of 7.8 × 1032 years on the neutron lifetime at a 90% confidence level.

Abstract
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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 CE, 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 Het al., 2025,

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

, Journal of High Energy Physics, Vol: 2025

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−1 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.

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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 B0 and Bs0 mesons using B0 → J/ψK+π− 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 B0 mesons and 20% for Bs0 mesons when compared to the combined performance of the existing LHCb flavour-tagging algorithms.

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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.

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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.

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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−1, 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 ρ0 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 ρ0 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 ρ0 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.

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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, 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 Vet al., 2025,

Search for the lepton-flavour-violating decays B0→ K*0τ±e∓

, Journal of High Energy Physics, Vol: 2025

A first search at LHCb for the lepton-flavour-violating decays B0 → K*0τ±e∓ is presented. The analysis is performed using a sample of proton-proton collision data, collected with the LHCb detector at a centre-of-mass energy of 13 TeV between 2016 and 2018, corresponding to an integrated luminosity of 5.4 fb−1. No significant signal is observed, and upper limits on the branching fractions are determined to be BB0→K∗0τ−e+<5.97.1×10−6 and BB0→K∗0τ+e−<4.95.9×10−6 at the 90% (95%) confidence level. These results correspond to the current most stringent upper limits for b → sτl transitions.

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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, 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 Vet al., 2025,

Measurement of ψ(2S) to J/ψ cross-section ratio as function of multiplicity in pPb collisions at sNN=8.16 TeV

, Journal of High Energy Physics, Vol: 2025

The production ratio of ψ(2S) to J/ψ charmonium states is presented as a function of multiplicity in proton-lead collisions at a centre-of-mass energy of sNN=8.16 TeV, for both prompt and nonprompt sources. The total luminosity recorded by the LHCb experiment corresponds to 13.6 nb−1 for pPb collisions and 20.8 nb−1 for Pbp collisions, where the first particle corresponds to the particle traveling towards the detector. Measurements are performed in the dimuon final state at forward (backward) centre-of-mass rapidity, with respect to the proton direction, 1.5 < y*< 4.0 (−5.0 < y*< −2.5) for pPb (Pbp) collisions. A multiplicity dependence of the prompt production ratio is observed in pPb collisions, whereas no dependence is found in nonprompt production, nor in either prompt or nonprompt production in Pbp collisions. These results suggest that in the Pb-going direction additional suppression mechanisms beyond comover effects may be present, possibly related to the formation of quark-gluon plasma. This highlights a transition from small to large collision systems and provides important insight into the suppression of charmonia in proton-nucleus collisions.

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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 √( s ) = 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

Zunica G, Zuliani D, Zou Q, Zhuo J, Zhukov V, Zhu Y, Zhu X, Zhu X, Zhu LZ, Zhovkovska V, Zhou Y, Zhou X, Zhou T, Zheng Y, Zheng XZ, Zheng SZ, Zhelezov A, Zhao Y, Zhang Z, Zhang YZ, Zhang Y, Zhang S, Zhang S, Zhang R, Zhang L, Zhang J, Zhang D, Zhang C, Zeng M, Zeng C, Zenesini F, Zdybal M, Zavertyaev M, Saa JAZ, Zaffaroni E, Yuan Y, Yuan X, Yu J, Yu CY, Yin X, Yin H, Yeung H, Yeroshenko V, Yang Z, Yang Y, Yang Y, Yang X, Yang K, Xu Z, Xu Z, Xu Z, Xu M, Xu L, Xu L, Xu A, Xing TX, Xie Y, Xiang Z, Xian S, Wyllie K, Wu Z, Wu Y, Wu X, Wu J, Wu H, Wotton SA, Wormser G, Wood E, Wolf T, Witola L, Witek M, Wislicki W, Winn M, Wilson FF, Williams Z, Williams S, Williams R, Williams MRJ, Williams MJ, Williams M, Wilkinson MK, Wilkinson G, Wild C, Wiegertjes MA, Wiedner D, Wiederhold AR, Whiter E, Whitehead M, White C, Westhenry BDC, Wendel J, Weida Z, Wei Y, Websdale D, Watson NK, Waterlaat M, Ward JA, Wang Z, Wang Z, Wang YHet al., 2025,

Deuteron identification via time of flight with LHCb

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

It is shown that the timing capabilities of the LHCb detector operated during the LHC Run 2 can be used to identify light ion particles with momenta of a few GeV/c. This is achieved by estimating the particle time of flight through a newly developed technique. A dedicated reconstruction procedure and a neural-network-based estimator of the particle speed have been developed to enable deuteron identification by suppressing the abundant background from lighter particles. The performance of the identification procedure is demonstrated in a sample of proton-helium collisions at sNN = 110 GeV, where the production of deuteron and triton particles is observed. This novel approach opens the way to study deuteron and antideuteron production for different collision systems at different energy scales, exploiting the rich dataset collected by the LHCb experiment.

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