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  • Journal article
    Morgan K, Azuma T, Baptista G, Becker D, Bennett D, Butin F, Dean JW, Eizenberg O, Fowler JW, Fujioka H, Gamba D, Gard JD, Garroum N, Guerra M, Hashimoto T, Higuchi T, Hori M, Indelicato P, Keller M, Machado J, Mates JAB, Nakamura N, Nobles J, Nez F, Ohayon B, Okada S, Ortiz N, Rathi S, Roosa M, Rousse JY, Saito T, Schmidt D, Senetaire Q, Sommerfeldt J, Szypryt P, Ullom J, Weber J, Yzombard P, Zito M, Paul N, Swetz Det al., 2026,

    Transition-Edge Sensor Spectrometer for Precision Spectroscopy of Antiprotonic Atoms

    , IEEE Transactions on Applied Superconductivity, Vol: 36, ISSN: 1051-8223

    antiProtonic Atom X-ray (PAX) spectroscopy is an experiment that aims to test strong-field quantum electrodynamics (QED) effects by performing high-precision X-ray spectroscopy of antiprotonic atoms. PAX will use a low-energy antiproton beam provided by the Extra Low ENergy Antiproton (ELENA) ring at the European Organization for Nuclear Research (CERN) to create antiprotonic atoms. A superconducting transition-edge sensor (TES) spectrometer will be used to measure the energy of transitions between circular Rydberg states in these atoms. The energy range of interest for the experiment spans 50 keV to 250 keV, and the desired precision for measuring the centroids of the emission lines is 10^{-5}. The spectrometer for PAX is intended to have four 96-pixel TES arrays and will be read out with a microwave superconducting quantum interference device (SQUID) multiplexer. As a step toward building the full instrument, we built a scaled-down version of the spectrometer that was installed at the TEst Line for Machine And Antimatter eXperiments (TELMAX) facility at ELENA in April 2025. The purpose of this deployment was to make an observation of X-ray emission by antiprotonic atoms and to better understand the effect of the pionic charged particle background due to antiproton annihilation on the performance of the TES array. This pilot spectrometer had an array of 60 TES pixels in a compact adiabatic demagnetization refrigerator cryostat. The sensors were read out with a microwave SQUID multiplexer. Each pixel consisted of a molybdenum/gold bilayer TES with a coplanar gold “landing pad” for a bulk tin absorber that was attached by an epoxy joint. We discuss the design of the TES pixels, the microwave SQUID readout, and the cryogenic platform. Finally, we present calibration data obtained at TELMAX using radioactive sources to assess the performance of the spectrometer in the antiproton beam-off condition.
  • 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 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 FA, Khan A, 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, Manganote EJT, Pereira AV, Aldá Júnior WL, Malbouisson HB, Carvalho Wet al., 2026,

    Characterizing the initial state and dynamical evolution in XeXe and PbPb collisions using multiparticle cumulants

    , Physics Letters Section B Nuclear Elementary Particle and High Energy Physics, Vol: 876, ISSN: 0370-2693

    For the first time, correlations among mixed-order moments of two or three flow harmonics —(v<inf>n</inf><sup>k</sup>,v<inf>m</inf><sup>l</sup>) and (v<inf>n</inf><sup>k</sup>,v<inf>m</inf><sup>l</sup>,v<inf>p</inf><sup>q</sup>), with k, l , and q denoting the respective orders—are measured in xenon–xenon (XeXe) collisions and compared with lead–lead (PbPb) results, providing a novel probe of collective behavior in heavy ion collisions. These measurements compare a nearly spherical, doubly-magic <sup>208</sup>Pb nucleus to a triaxially deformed <sup>129</sup>Xe nucleus, emphasizing the sensitivity to initial-state geometry fluctuations arising from nuclear deformation. The dependence of these results (v<inf>n</inf> , n=2,3,4) on the shape and size of the nuclear overlap region is studied. Comparisons between v <inf>2</inf>, v <inf>3</inf>, and v <inf>4</inf> demonstrate the importance of v <inf>3</inf> and v <inf>4</inf> in exploring the nonlinear hydrodynamic response of the quark-gluon plasma (QGP) to the initial spatial anisotropy. The results constrain initial-state model parameters that influence the evolution of the QGP. The CMS detector was used to collect XeXe and PbPb data at nucleon-nucleon center-of-mass energies of S<inf>NN</inf>=5.44 and 5.36 TeV, respectively. Correlations are extracted using multiparticle mixed-harmonic cumulants (up to eight-particle cumulants) with charged particles in the pseudorapidity range | η | ' 2.4 and transverse momentum range 0.5 ' p<inf>T</inf> ' 3 GeV/c.
  • Journal article
    Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Benato L, Bergauer T, Dragicevic M, Giordano C, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Matthewman M, Schieck J, Schöfbeck R, 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, Sharma A, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, Zhang F, De Coen M, Dobur D, Gokbulut G, Marckx D, Skovpen K, Tomaru AM, Van Den Bossche N, van der Linden J, Vandenbroeck J, Wezenbeek L, Aarup Petersen H, Bein S, Benecke A, Bethani A, Bruno G, Cappati A, De Favereau De Jeneret J, Delaere C, Gameiro Casalinho F, Giammanco A, Guzel AO, Lemaitre V, Lidrych J, Malek P, Mastrapasqua P, Turkcapar S, Alves GA, Barroso Ferreira Filho M, Coelho E, Hensel C, Matos Figueiredo D, 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, Calligaris L, Damas F, Tomei TRFP, Gregores EM, Lopes Da Costa B, Maietto Silverio I, Mercadante PG, Novaes SF, 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, Yang H, Chen GM, Chen HS, Chen M, Chen Y, Hou Q, Hou X, Iemmi F, Jiang CHet al., 2026,

    Observation of Suppressed Charged-Particle Production in Ultrarelativistic Oxygen-Oxygen Collisions

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

    <jats:p> A hot and dense state of nuclear matter, known as the quark-gluon plasma, is created in collisions of ultrarelativistic heavy nuclei. Highly energetic quarks and gluons, collectively referred to as partons, lose energy as they travel through this matter, leading to suppressed production of particles with large transverse momenta ( <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mrow> <a:msub> <a:mrow> <a:mi>p</a:mi> </a:mrow> <a:mrow> <a:mi mathvariant="normal">T</a:mi> </a:mrow> </a:msub> </a:mrow> </a:math> ). Conversely, high- <d:math xmlns:d="http://www.w3.org/1998/Math/MathML" display="inline"> <d:msub> <d:mi>p</d:mi> <d:mi mathvariant="normal">T</d:mi> </d:msub> </d:math> particle suppression has not been seen in proton-lead collisions, raising questions regarding the minimum system size required to observe parton energy loss. Oxygen-oxygen (OO) collisions examine a region of effective system size that lies between these two extreme cases. The CMS detector at the CERN LHC has been used to quantify charged-particle production in inclusive OO collisions for the first time via measurements of the nuclear modification factor ( <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"> <g:msub>
  • 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, Tomaru AM, 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-et al., 2026,

    Improving missing transverse momentum estimation with a deep neural network

    , Physical Review D, Vol: 113, ISSN: 2470-0010

    <jats:p> At hadron colliders, the net transverse momentum of particles that do not interact with the detector (missing transverse momentum, <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:msubsup> <a:mover accent="true"> <a:mi>p</a:mi> <a:mo stretchy="false">→</a:mo> </a:mover> <a:mi mathvariant="normal">T</a:mi> <a:mrow> <a:mi>miss</a:mi> </a:mrow> </a:msubsup> </a:math> ) is a crucial observable in many analyses. In the standard model, <f:math xmlns:f="http://www.w3.org/1998/Math/MathML" display="inline"> <f:msubsup> <f:mover accent="true"> <f:mi>p</f:mi> <f:mo stretchy="false">→</f:mo> </f:mover> <f:mi mathvariant="normal">T</f:mi> <f:mrow> <f:mi>miss</f:mi> </f:mrow> </f:msubsup> </f:math> originates from neutrinos. Many beyond-the-standard-model particles, such as dark matter candidates, are also expected to leave the experimental apparatus undetected. This paper presents a novel deep neural network based <k:math xmlns:k="http://www.w3.org/1998/Math/MathML" display="inline"> <k:ms
  • 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, Schwarz D, Schöfbeck R, 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, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Fernandez Perez Tomei TR, 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., 2026,

    Jet fragmentation function and groomed substructure of bottom quark jets in proton-proton collisions at 5.02 TeV

    , Journal of High Energy Physics, Vol: 2026

    <jats:title> A <jats:sc>bstract</jats:sc> </jats:title> <jats:p> A measurement of the substructure of bottom quark jets (b jets) in proton-proton (pp) collisions is presented. The measurement uses data collected in pp collisions at <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ \sqrt{s}=5.02 $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>5.02</mml:mn> </mml:math> </jats:alternatives> </jats:inline-formula> TeV, with a low number of simultaneous interactions per bunch crossing, recorded by the CMS experiment in 2017, corresponding to an integrated luminosity of 301 pb <jats:sup> <jats:italic>−</jats:italic> 1 </jats:sup> . An algorithm to identify and cluster the charged decay daughters of b hadrons is developed for this analysis, which facilitates the exposure of the gluon radiation pattern of b jets using iterative Cambridge-Aachen declustering. The soft-drop-groomed jet radius, <jats:italic>R</jats:italic> <jats:sub>g</jats:sub> , and momentum balance, <jats:italic>z</jats:italic> <jats:sub>g</jats:sub> , of b quark jets are presented. These observables c
  • 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, Schwarz D, Schöfbeck R, 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, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Fernandez Perez Tomei TR, 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., 2026,

    Search for light pseudoscalar boson pairs produced from Higgs boson decays using the 4τ and 2μ2τ final states in proton-proton collisions at $$ \sqrt{s}=13 $$ TeV

    , Journal of High Energy Physics, Vol: 2026

    <jats:title> A <jats:sc>bstract</jats:sc> </jats:title> <jats:p> A search for a pair of light pseudoscalar bosons (a <jats:sub>1</jats:sub> ) produced in the decay of the 125 GeV Higgs boson is presented. The analysis examines decay modes where one a <jats:sub>1</jats:sub> decays into a pair of tau leptons and the other decays into either another pair of tau leptons or a pair of muons. The a <jats:sub>1</jats:sub> boson mass probed in this study ranges from 4 to 15 GeV. The data sample was recorded by the CMS experiment in proton-proton collisions at a center-of-mass energy of 13 TeV and corresponds to an integrated luminosity of 138 fb <jats:sup> <jats:italic>−</jats:italic> 1 </jats:sup> . No excess above standard model (SM) expectations is observed. The study combines the 4τ and 2μ2τ channels to set upper limits at 95% confidence level (CL) on the product of the Higgs boson production cross section and the branching fraction to the 4τ final state, relative to the Higgs boson production cross section predicted by the SM. In this interpretation, the a <jats:sub>1</jats:sub> boson is assumed to have Yukawa-like couplings to fermions, with coupling strengths proportional to the respective fermion masses. The observed (expected) upper limits range between 0.007 (0.011) and 0.079 (0.066) across the mass range considered. The results are also interpreted in the context of models with two Higgs doublets and an additional complex singlet field (2HD+S). The tightest constraints are obtained for the Type III 2HD+S mod
  • 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, Schwarz D, Schöfbeck R, 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, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Fernandez Perez Tomei TR, 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., 2026,

    Combination and interpretation of differential Higgs boson production cross sections in proton-proton collisions at $$ \sqrt{s}=13 $$ TeV

    , Journal of High Energy Physics, Vol: 2026

    <jats:title> A <jats:sc>bstract</jats:sc> </jats:title> <jats:p> Precision measurements of Higgs boson differential production cross sections are a key tool to probe the properties of the Higgs boson and test the standard model. New physics can affect both Higgs boson production and decay, leading to deviations from the distributions that are expected in the standard model. In this paper, combined measurements of differential spectra in a fiducial region matching the experimental selections are performed, based on analyses of four Higgs boson decay channels (γγ, ZZ <jats:sup>(*)</jats:sup> , WW <jats:sup>(*)</jats:sup> , and ττ) using proton-proton collision data recorded with the CMS detector at <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ \sqrt{s}=13 $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>13</mml:mn> </mml:math> </jats:alternatives> </jats:inline-formula> TeV, corresponding to an integrated luminosity of 138 fb <jats:sup> <jats:italic>−</jats:italic> 1 </jats:sup> . The differential measurements are extrapolated to the full phase space and combined to provide the differential spectra. A
  • 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, Schwarz D, Schöfbeck R, 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, Tomaru AM, 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, Gameiro Casalinho F, 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, Gregores EM, Lopes Da Costa B, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Fernandez Perez Tomei TR, 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, Yang H, Chen GM, Chen HS, Chen M, Chen Y, Hou Q, Hou X, Iemmi Fet al., 2026,

    Inclusive and differential measurements of the $$ \textrm{t}\overline{\textrm{t}}\upgamma $$ cross section and the $$ \textrm{t}\overline{\textrm{t}}\upgamma /\textrm{t}\overline{\textrm{t}} $$ cross section ratio in proton-proton collisions at $$ \sqrt{s}=13 $$ TeV

    , Journal of High Energy Physics, Vol: 2026

    <jats:title> A <jats:sc>bstract</jats:sc> </jats:title> <jats:p> Inclusive and differential cross section measurements of top quark pair ( <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ \textrm{t}\overline{\textrm{t}} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>t</mml:mi> <mml:mover> <mml:mi>t</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> </jats:alternatives> </jats:inline-formula> ) production in association with a photon (γ) are performed as a function of lepton, photon, top quark, and <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ \textrm{t}\overline{\textrm{t}} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>t</mml:mi> <mml:mover> <mml:mi>t</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> </jats:alternatives> </jats:inline-formula> kinematic observables, using data from proton-proton collisions at <jats:inline-formula> <jats:alternatives> <jats:tex
  • Journal article
    Tomalak O, Meyer AS, Wret C, Cai T, Hill RJ, McFarland KSet al., 2026,

    Nucleon axial-vector form factor and radius from radiatively corrected antineutrino scattering data

    , Physical Review D, Vol: 113, ISSN: 2470-0010

    <jats:p> The nucleon axial-vector form factor, <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:msub> <a:mi>G</a:mi> <a:mi>A</a:mi> </a:msub> </a:math> , is critical to determine the electroweak interactions of leptons with nucleons. Important examples of processes influenced by <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"> <c:msub> <c:mi>G</c:mi> <c:mi>A</c:mi> </c:msub> </c:math> are elastic (anti)neutrino-nucleon scattering and muon capture by the proton. Sparse experimental data results in a large uncertainty on the momentum dependence of <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"> <e:msub> <e:mi>G</e:mi> <e:mi>A</e:mi> </e:msub> </e:math> and has motivated the consideration of new experimental probes and first-principles lattice quantum chromodynamics (QCD) evaluations. The comparison of new and precise theoretical predictions for <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"> <g:msub> <g:mi>G</g:mi> <g:mi>A</g:mi> </g:msub> </g:math> with future experimental data necessitates the application of radiat
  • Journal article
    Miki S, Abe K, Abe S, Asaoka Y, Bronner C, Harada M, Hayato Y, Hiraide K, Hosokawa K, Ieki K, Ikeda M, Kameda J, Kanemura Y, Kaneshima R, Kashiwagi Y, Kataoka Y, Mine S, Miura M, Moriyama S, Nakahata M, Nakayama S, Noguchi Y, Okamoto K, Pronost G, Sato K, Sekiya H, Shiba H, Shimizu K, Shiozawa M, Sonoda Y, Suzuki Y, Takeda A, Takemoto Y, Takenaka A, Tanaka H, Watanabe S, Yano T, Kajita T, Okumura K, Tashiro T, Tomiya T, Wang X, Yoshida S, Megias GD, Fernandez P, Labarga L, Ospina N, Zaldivar B, Pointon BW, Yanagisawa C, Kearns E, Raaf JL, Wan L, Wester T, Bian J, Cortez B, Griskevich NJ, Locke S, 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, Giampaolo A, Mueller TA, Santos AD, Paganini P, Quach C, Quilain B, Rogly R, Nakamura T, Jang JS, Litchfield RP, Machado LN, Soler FJP, Learned JG, Choi K, Iovine N, Cao S, Anthony LHV, Martin D, Prouse NW, Scott M, Sztuc AA, Uchida Y, Berardi V, Calabria NF, Catanesi MG, Radicioni E, Calabria NF, Langella A, De Rosa G, Collazuol G, Feltre M, Iacob F, Lamoureux M, Mattiazzi M, Ludovici L, Gonin M, Périssé L, Quilain B, Fujisawa C, Horiuchi S, Kobayashi M, Liu YM, Maekawa Y, Nishimura Y, Okazaki R, Akutsu R, Friend M, Hasegawa T, Ishida T, Kobayashi T, Jakkapu M, Matsubara T, Nakadaira T, Nakamura K, Oyama Y, Portocarrero Yrey A, Sakashita K, Sekiguchi T, Tsukamoto T, Bhuiyan N, Burton GT, Di Lodovico F, Gao J, Goldsack A, Katori T, Migenda J, Ramsden RM, Xie Z, Zsoldos S, Kotsar Y, Ozaki H, Suzuki AT, Takagi Y, Takeuchi Y, Zhong H, Feng J, Feng L, Han S, Hu JR, Hu Z, Kawaue M, Kikawa T, Mori M, Nakaya T, Ngoc TV, Wendell RA, Yasutome K, Jenkins SJ, McCauley N, Mehta P, Tarrant A, Wilking MJ, Fukuda Y, Itow Y, Menjo H, Ninomiya K, Yoshioka Y, Lagoda J, Mandal M, Mijakowski P, Prabhu YS, Zalipska J, Jia M, Jiang J, Jung CK, Shi W, Wilking MJ, Hino Y, Ishino H, Kitagawa H, Koshio Y, Nakanishi F, Sakai S, Tada T Tet al., 2026,

    Neutron-Multiplicity Measurement in Muon Capture on Oxygen Nuclei in the Gadolinium-Loaded Super-Kamiokande Detector.

    , Phys Rev Lett, Vol: 136

    In recent neutrino detectors, neutrons produced in neutrino reactions play an important role. Muon capture on oxygen nuclei is one of the processes that produce neutrons in water Cherenkov detectors. We measured neutron multiplicity in the process using cosmic ray muons that stop in the gadolinium-loaded Super-Kamiokande detector. For this measurement, neutron detection efficiency is obtained with the muon capture events followed by gamma rays to be 50.2_{-2.1}^{+2.0}%. By fitting the observed multiplicity considering the detection efficiency, we measure neutron multiplicity in muon capture as P(0)=24±3%, P(1)=70_{-2}^{+3}%, P(2)=6.1±0.5%, P(3)=0.38±0.09%. This is the first measurement of the multiplicity of neutrons associated with muon capture on oxygen without neutron energy threshold.
  • Journal article
    Summers S, Tapper A, Årrestad TK, Qin C, Rathsman K, Streeter M, Palmer C, Citrin J, Zheng C, Zilberman N, Titterton A, Becker Tet al., 2026,

    Roadmap on fast machine learning for science

    , Machine Learning: Science and Technology, Vol: 7, Pages: 021501-021501

    <jats:title>Abstract</jats:title> <jats:p>The need for microsecond speed machine learning (ML) inference for particle physics experiments has emerged in recent years, in particular for the forthcoming upgrades to the experiments at the Large Hadron Collider at CERN. A community has grown around the need to develop the custom hardware platforms and tools required. The material presented in this report is drawn from the latest workshop held by the fast ML for science community and comprises of a collection of perspectives on the status of fast ML in different scientific domains, and the supporting technology.</jats:p>
  • Journal article
    Anastopoulos C, Assmann R, Ball AH, Bruning O, Buchmueller O, Camporesi T, Collier P, Dainton J, Davies G, Ellis JR, Ferrari P, Goddard B, Gouskos L, Hall G, Klute M, Koratzinos M, Landsberg G, Long K, Malgeri L, Maltoni F, Moortgat F, Mariotti C, Myers S, Osborne JA, Pierini M, Raimondi P, Tovey DR, Treille D, Virdee TS, Wardle N, Zanetti Met al., 2026,

    LEP3: a high-luminosity <i>e</i> <sup>+</sup> <i>e</i> <sup>−</sup> Higgs and electroweak factory in the LHC tunnel*

    , Journal of Physics G: Nuclear and Particle Physics, Vol: 53, Pages: 040501-040501, ISSN: 0954-3899

    <jats:title>Abstract</jats:title> <jats:p>The 2020 European Strategy for Particle Physics (ESPP) emphasized the critical importance of completing the high-luminosity LHC (HL-LHC) upgrade of both the accelerator and experiments in a timely manner, identifying it as a top priority for the field. The strategy also established two key recommendations for future accelerator initiatives: (i) the realization of an electron–positron Higgs factory as the highest-priority next collider, and (ii) the investigation, in collaboration with international partners, of the technical and financial feasibility of a hadron collider at CERN with a centre-of-mass energy of at least 100 TeV, potentially preceded by an electron–positron Higgs and electroweak factory. In alignment with these objectives, the Future Circular Collider (FCC) programme—comprising FCC-ee and FCC-hh—represents the preferred path forward for CERN, offering both precision and energy-frontier capabilities. However, the 2025 ESPP update calls for the identification of prioritized alternative options should the preferred FCC pathway prove infeasible or non-competitive. In this context, we propose LEP3, an electron–positron collider reusing the existing LHC tunnel, as a strategic backup to FCC-ee. LEP3 would exploit much of the research and development already carried out for FCC-ee, enabling high-precision studies of the Z, W, and Higgs bosons below the top–antitop production threshold. Combining strong physics potential with reduced cost, LEP3 provides performance comparable or superior to other fallback options—such as linear, muon, or LHeC colliders—while maintaining the technological continuity essential for a future energy-frontier collider. Conceived as a contingency, LEP3 complements, rather than competes with, the FCC-ee proposal.</jats:p>
  • Journal article
    Akgül B, Fedar YE, Yüksel O, Yüksel F, Erkmen B, Sakarya U, Tural Polat SN, David A, Dauncey P, Shukla Ret al., 2026,

    Development and implementation of a non-zero suppression system for HGCAL back-end electronics

    , Journal of Instrumentation, Vol: 21

    In preparation for operations at the HL-LHC, the CMS Collaboration is upgrading its endcap calorimeters with a high granularity calorimeter (HGCAL). The HGCAL back-end electronics includes two Non-Zero Suppression (NZS) boards, which dynamically disable zero-suppression in designated regions of interest. This paper presents a detailed discussion of the principal components of the implemented NZS firmware and a comprehensive account of the hardware testing performed on the Serenity platform, including validation against a Python-based emulator. Each of the 48 DAQ (Data Acquisition) boards of a single endcap receives 432-bit NZS flags, which are generated non-zero-suppression control flags to disable zero suppression for designated regions of interest on the front-end sections and sent via high-speed output channels operating at 25 Gbps. The NZS firmware processes data from six EMTF input links operating at 25 Gbps, and produces the necessary non-zero suppression control flags for real-time selection and spatial mapping of up to 27 muon candidates per bunch crossing under a 360 MHz system clock constraint. To meet the stringent timing requirements, the design adopts a fully pipelined FPGA architecture, enabling deterministic latency while sustaining continuous high-throughput operation.
  • Journal article
    Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Benato L, Bergauer T, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Matthewman M, Schieck J, Schöfbeck R, 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, 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, Sharma A, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, Zhang F, De Coen M, Dobur D, Giordano C, Gokbulut G, Kaspar K, Kavtaradze D, Marckx D, Skovpen K, Tomaru AM, Van Den Bossche N, van der Linden J, Vandenbroeck J, Aarup Petersen H, Bein S, Benecke A, Bethani A, Bruno G, Cappati A, De Favereau De Jeneret J, Delaere C, Gameiro Casalinho F, Giammanco A, Guzel AO, Lemaitre V, Lidrych J, Malek P, Mastrapasqua P, Turkcapar S, Alves GA, Barroso Ferreira Filho M, Coelho E, Hensel C, Matos Figueiredo D, 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, Calligaris L, Damas F, Gregores EM, Lopes Da Costa B, Maietto Silverio I, Mercadante PG, Novaes SF, Padula SS, Scheurer V, Fernandez Perez Tomei TR, 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, Yang H, Chen GM, Chen HS, Chen M, Chen Y, Hou Q, Hou X, Iemmi F Jet al., 2026,

    High-level hadronic tau lepton triggers of the CMS experiment in proton-proton collisions at √(s) = 13.6 TeV

    , Journal of Instrumentation, Vol: 21, Pages: P04002-P04002

    <jats:title>Abstract</jats:title> <jats:p> The trigger system of the CMS detector is pivotal in the acquisition of data for physics measurements and searches. Studies of final states characterized by hadronic decays of tau leptons require the reconstruction and the identification of genuine tau leptons against quark- and gluon-initiated jets at the trigger level. This is a difficult task, particularly as improvements to the LHC have resulted in an increased number of interactions per bunch crossing in recent years. To address this challenge, a series of machine-learning algorithms with high identification efficiency and low computational cost have been incorporated into the high-level trigger for hadronically decaying tau leptons. In this paper, these developments and the trigger performance are summarized using data collected by the CMS experiment in proton-proton collisions at √( <jats:italic>s</jats:italic> ) = 13.6 TeV in 2022–2023, corresponding to an integrated luminosity of 62 fb <jats:sup>-1</jats:sup> . </jats:p>
  • Journal article
    CMS Collaboration, 2026,

    High-precision measurement of the W boson mass with the CMS experiment.

    , Nature, Vol: 652, Pages: 321-327

    In the standard model of particle physics, the masses of the W and Z bosons, the carriers of the weak interaction, are uniquely related. A precise determination of their masses is important because quantum loops of heavy, undiscovered particles could modify this relationship. Although the Z mass is known to the remarkable precision of 22 parts per million (2.0 MeV), the W mass is known much less precisely. A global fit to measured electroweak observables predicts the W mass with 6 MeV uncertainty1-3. Reaching a comparable experimental precision would be a sensitive and fundamental test of the standard model, made even more urgent by a recent challenge to the global fit prediction by a measurement from the CDF Collaboration at the Fermilab Tevatron collider4. Here we report the measurement of the W mass by the CMS Collaboration at the CERN Large Hadron Collider, based on a large data sample of W → μν events collected in 2016 at the proton-proton collision energy of 13 TeV. The measurement exploits a high-granularity maximum likelihood fit to the kinematic properties of muons produced in W decays. By combining an accurate determination of experimental effects with marked in situ constraints of theoretical inputs, we reach a precise measurement of the W mass, of 80,360.2 ± 9.9 MeV, in agreement with the standard model prediction.
  • Journal article
    Abdullahi AM, Abratenko P, Andrade Aldana D, Arellano L, Asaadi J, Ashkenazi A, Balasubramanian S, Baller B, Barnard A, Barr G, Barrow D, Barrow J, Basque V, Bateman J, Benevides Rodrigues O, Berkman S, Bhat A, Bhattacharya M, Bishai M, Blake A, Bogart B, Bolton T, Brunetti MB, Camilleri L, Caratelli D, Cavanna F, Cerati G, Chappell A, Chen Y, Conrad JM, Convery M, Cooper-Troendle L, Crespo-Anadón JI, Cross R, Del Tutto M, Dennis SR, Detje P, Diurba R, Djurcic Z, Duffy K, Dytman S, Eberly B, Englezos P, Ereditato A, Evans JJ, Fang C, Foreman W, Fleming BT, Franco D, Furmanski AP, Gao F, Garcia-Gamez D, Gardiner S, Ge G, Gollapinni S, Gramellini E, Green P, Greenlee H, Gu L, Gu W, Guenette R, Guzowski P, Hagaman L, Handley MD, Hen O, Hilgenberg C, Hoefken Zink J, Horton-Smith GA, Hostert M, Hussain A, Irwin B, Ismail MS, James C, Ji X, Jo JH, Johnson RA, Kalra D, Karagiorgi G, Ketchum W, Kirby M, Kobilarcik T, Lane N, Li J-Y, Li Y, Lin K, Littlejohn BR, Liu L, Louis WC, Luo X, Mahmud T, Majeed N, Mariani C, Marshall J, Martinez N, Martinez Caicedo DA, Martynenko S, Massaro D, Mastbaum A, Mawby I, McConkey N, Mellet L, Mendez J, Micallef J, Mogan A, Mohayai T, Mooney M, Moor AF, Moore CD, Mora Lepin L, Moudgalya MM, Mulleriababu S, Naples D, Navrer-Agasson A, Nayak N, Nebot-Guinot M, Nguyen C, Nowak J, Oza N, Palamara O, Pallat N, Paolone V, Papadopoulou A, Papavassiliou V, Pascoli S, Parkinson HB, Pate SF, Patel N, Pavlovic Z, Piasetzky E, Pletcher K, Pophale I, Qian X, Raaf JL, Radeka V, Rafique A, Reggiani-Guzzo M, Rodriguez Rondon J, Rosenberg M, Ross-Lonergan M, Safa I, Schmitz DW, Schukraft A, Seligman W, Shaevitz MH, Sharankova R, Shi J, Snider EL, Soderberg M, Söldner-Rembold S, Spitz J, Stancari M, John JS, Strauss T, Szelc AM, Taniuchi N, Terao K, Thorpe C, Torbunov D, Totani D, Toups M, Trettin A, Tsai Y-T, Tyler J, Uchida MA, Usher T, Viren B, Wang J, Weber M, Wei H, White AJ, Wolbers S, Wongjirad T, Wresilo K, Wu W, Yandel E, Yang T, Yates LE, Yu HW, Zellet al., 2026,

    First Search for Dark Sector e^{+}e^{-} Explanations of the MiniBooNE Anomaly at MicroBooNE.

    , Phys Rev Lett, Vol: 136

    We present MicroBooNE's first search for dark sector e^{+}e^{-} explanations of the long-standing MiniBooNE anomaly. The MiniBooNE anomaly has garnered significant attention over the past 20 years including previous MicroBooNE investigations into both anomalous electron and photon excesses, but its origin still remains unclear. In this Letter, we provide the first direct test of dark sector models in which dark neutrinos, produced through neutrino-induced scattering, decay into missing energy and visible e^{+}e^{-} pairs comprising the MiniBooNE anomaly. Many such models have recently gained traction as a viable solution to the anomaly while evading past bounds. Using an exposure of 6.87×10^{20} protons-on-target in the Booster Neutrino Beam, we implement a selection targeting forward-going, coherently produced e^{+}e^{-} events. After unblinding, we observe 95 events, which we compare with the constrained background-only prediction of 69.7±17.3. This analysis sets the world's first direct limits on these dark sector models and, at the 95% confidence level, excludes the entirety of the single dark neutrino and majority of the dual dark neutrino, parameter space that is viable as a solution to the MiniBooNE anomaly.
  • 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, Shooshtari M, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Kwon H, Van Laer T, Van Mechelen P, Bierkens J, Breugelmans N, D'Hondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, 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, 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, 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, Bernardes CA, Calligaris L, 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, 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 Zet al., 2026,

    Measurement of D^{0} Meson Photoproduction in Ultraperipheral Heavy Ion Collisions.

    , Phys Rev Lett, Vol: 136

    This Letter reports the first measurement of photonuclear D^{0} meson production in ultraperipheral heavy ion collisions. The study is performed using lead-lead collision data, with an integrated luminosity of 1.34  nb^{-1}, collected by the CMS experiment at a nucleon-nucleon center-of-mass energy of 5.36 TeV. Photonuclear events, where one of the colliding nuclei breaks up and the other remains intact, are selected based on breakup neutron emissions and by requiring no particle activity in a large rapidity interval in the direction of the photon-emitting nucleus. The D^{0} mesons are reconstructed via the D^{0}→K^{-}π^{+} decay channel, with the cross section measured as a function of D^{0} meson transverse momentum and rapidity. The results are compared with next-to-leading-order perturbative QCD calculations that employ recent parametrizations of the lead nuclear parton distribution functions, as well as with predictions based on the color glass condensate framework. This measurement is the first photonuclear collision study characterizing parton distribution functions of lead nuclei for parton fractional momenta x (relative to the nucleon) ranging approximately from a few 10^{-4} to 10^{-2} for different hard energy scale Q^{2} selections.
  • Journal article
    Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Benato L, Bergauer T, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Matthewman M, Schieck J, Schöfbeck R, 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, 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, Sharma A, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, Zhang F, De Coen M, Dobur D, Giordano C, Gokbulut G, Kaspar K, Kavtaradze D, Marckx D, Skovpen K, Tomaru AM, Van Den Bossche N, van der Linden J, Vandenbroeck J, Aarup Petersen H, Bein S, Benecke A, Bethani A, Bruno G, Cappati A, De Favereau De Jeneret J, Delaere C, Gameiro Casalinho F, Giammanco A, Guzel AO, Lemaitre V, Lidrych J, Malek P, Mastrapasqua P, Turkcapar S, Alves GA, Barroso Ferreira Filho M, Coelho E, Hensel C, Matos Figueiredo D, 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, Calligaris L, Damas F, Tomei TRFP, Gregores EM, Lopes Da Costa B, Maietto Silverio I, Mercadante PG, Novaes SF, 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, Yang H, Chen GM, Chen HS, Chen M, Chen Y, Hou Q, Hou X, Iemmi F, Jianget al., 2026,

    Characterization of the quantum state of top quark pairs produced 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> using the beam and helicity bases

    , Physical Review D, Vol: 113, ISSN: 2470-0010

    <jats:p> Measurements of the spin correlation coefficients in the beam basis are presented for top quark-antiquark ( <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mi>t</a:mi> <a:mover accent="true"> <a:mi>t</a:mi> <a:mo stretchy="false">¯</a:mo> </a:mover> </a:math> ) systems produced in proton-proton collisions at <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"> <e:msqrt> <e:mi>s</e:mi> </e:msqrt> <e:mo>=</e:mo> <e:mn>13</e:mn> <e:mtext> </e:mtext> <e:mtext> </e:mtext> <e:mi>TeV</e:mi> </e:math> collected by the CMS experiment in 2016–2018, and corresponding to an integrated luminosity of <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"> <g:mn>138</g:mn> <g:mtext> </g:mtext> <g:mtext> </g:mtext> <g:msup> <g:mi>fb</g:mi> <g:mrow> <g:mo>−</g:mo> <g:mn>1</g:mn> </g:mrow> </g:msup> </g:math> . The <i:math xmlns
  • Journal article
    Abbaslu S, Abd Alrahman F, Abed Abud A, Acciarri R, Accorsi LP, Acero MA, Adames MR, Adamov G, Adamowski M, Adriano C, Akbar F, Alemanno F, Alex NS, Allison K, Alrashed M, Alton A, Alvarez R, Alves T, Aman A, Amar H, Amedo P, Anderson J, Andrade DA, Andreopoulos C, Andreotti M, Andrews MP, Andrianala F, Andringa S, Anjarazafy F, Ansarifard S, Antic D, Antoniassi M, Aranda-Fernandez A, Araya-Santander T, Arellano L, Arrieta Diaz E, Arroyave MA, Artero Pons M, Asaadi J, Ascencio M, Ashkenazi A, Asner D, Asquith L, Atkin E, Auguste D, Aurisano A, Aushev V, Autiero D, Ávila Gómez D, Azam MB, Azfar F, Back A, Back JJ, Bae Y, Bagaturia I, Bagby L, Baigarashev D, Balasubramanian S, Balboni A, Baldi P, Baldini W, Baldonedo J, Baller B, Bambah B, Barao F, Barbu D, Barenboim G, Barham Alzás P, Barker GJ, Barkhouse W, Barr G, Barros A, Barros N, Barrow D, Barrow JL, Basharina-Freshville A, Bashyal A, Basque V, Bassani M, Basu D, Batchelor C, Bathe-Peters L, Battat JBR, Battisti F, Bautista J, Bay F, Bazo Alba JLL, Beacom JF, Bechetoille E, Behera B, Belchior E, Bell B, Bell G, Bellantoni L, Bellettini G, Bellini V, Beltramello O, Belyaev A, Benitez Montiel C, Benjamin D, Bento Neves F, Berger J, Berkman S, Bermudez J, Bernal J, Bernardini P, Bersani A, Bertholet E, Bertolini E, Bertolucci S, Betancourt M, Betancur Rodríguez A, Bezawada Y, Bezerra AT, Bhat A, Bhatnagar V, Bhattacharjee M, Bhattacharjee S, Bhattacharya M, Bhuller S, Bhuyan B, Biagi S, Bian J, Biery K, Bilki B, Bishai M, Bishop P, Blake A, Blaszczyk FD, Blazey GC, Blucher E, Bodek A, Bogart B, Boissevain J, Bolognesi S, Bolton T, Bomben L, Bonesini M, Bonilla-Diaz C, Booth A, Boran F, Borden C, Borges Merlo R, Bostan N, Botogoske G, Bottino B, Bouet R, Boza J, Bracinik J, Brahma B, Brailsford D, Bramati F, Branca A, Brandt A, Bremer J, Brice SJ, Brio V, Brizzolari C, Bromberg C, Brooke J, Bross A, Brunetti G, Brunetti MB, Buchanan N, Budd H, Buergi J, Bundock A, Burgardt D, Butchart S, Caceres V G, Calabrese Ret al., 2026,

    Identification of low-energy kaons in the ProtoDUNE-SP detector

    , Physical Review D, Vol: 113, ISSN: 2470-0010

    <jats:p> The Deep Underground Neutrino Experiment (DUNE) is a next-generation neutrino experiment with a rich physics program that includes searches for the hypothetical phenomenon of proton decay. Utilizing liquid-argon time-projection chamber technology, DUNE is expected to achieve world-leading sensitivity in the proton decay channels that involve charged kaons in their final states. The first DUNE demonstrator, ProtoDUNE Single-Phase, was a 0.77 kt detector that operated from 2018 to 2020 at the CERN Neutrino Platform, exposed to a mixed hadron and electron test-beam with momenta ranging from 0.3 to <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mrow> <a:mn>7</a:mn> <a:mtext> </a:mtext> <a:mtext> </a:mtext> <a:mi>GeV</a:mi> <a:mo>/</a:mo> <a:mi mathvariant="normal">c</a:mi> </a:mrow> </a:math> . We present a selection of low-energy kaons among the secondary particles produced in hadronic reactions, using data from the 6 and <d:math xmlns:d="http://www.w3.org/1998/Math/MathML" display="inline"> <d:mrow> <d:mn>7</d:mn> <d:mtext> </d:mtext> <d:mtext> </d:mtext> <d:mi>GeV</d:mi> <d:mo>/</d:mo> <d:mi mathvariant="normal">c</d:mi> </d:mrow> </d:math> beam runs. The selecti
  • 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, Schwarz D, Schöfbeck R, 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., 2026,

    Vector boson scattering and anomalous quartic couplings in final states with ℓνqq or ℓℓqq plus jets using proton-proton collisions at s=13 TeV

    , Journal of High Energy Physics, Vol: 2026

    A measurement is presented of the electroweak vector boson scattering production of ZV (V = W, Z) boson pairs associated with two jets in proton-proton collisions at a center-of-mass energy of 13 TeV. The data, corresponding to an integrated luminosity of 138 fb<sup>−1</sup>, were collected at the CERN LHC with the CMS detector during the 2016–2018 data-taking period. The analysis targets final states with a pair of isolated electrons or muons from Z boson decays and three or four jets, depending on the momentum of the vector boson that decays into quarks. Signal strength is measured for events characterized by a large invariant mass of two forward jets with a wide pseudorapidity gap between them. The electroweak production of ZV in association with two jets is measured with an observed (expected) significance of 1.3 (1.8) standard deviations. A combination of the analyses of ZV channel and the previously published WV channel in the lepton plus jets final state places constraints on effective field theory parameters that describe anomalous electroweak production of WW, WZ, and ZZ boson pairs in association with two jets. Several world best limits are set on anomalous quartic gauge couplings in terms of dimension-8 standard model effective field theory operators.
  • 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, 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, Ben-Haim E, Benane G, Bencivenni G, 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., 2026,

    Measurement of the W → μν cross-sections as a function of the muon transverse momentum in pp collisions at 5.02 TeV

    , Journal of High Energy Physics, Vol: 2026

    The pp → W<sup>±</sup>(→ μ<sup>±</sup>ν<inf>μ</inf>)X cross-sections are measured at a proton-proton centre-of-mass energy s=5.02 TeV using a dataset corresponding to an integrated luminosity of 100 pb<sup>−1</sup> recorded by the LHCb experiment. Considering muons in the pseudorapidity range 2.2 < η < 4.4, the cross-sections are measured differentially in twelve intervals of muon transverse momentum between 28 < p<inf>T</inf>< 52 GeV. Integrated over p<inf>T</inf>, the measured cross-sections are (Formula presented.) where the first uncertainties are statistical, the second are systematic, and the third are associated with the luminosity calibration. These integrated results are consistent with theoretical predictions. This analysis introduces a new method to determine the W-boson mass using the measured differential cross-sections corrected for detector effects. The measurement is performed on this statistically limited dataset as a proof of principle and yields (Formula presented.) where the first uncertainty is experimental and the second is theoretical.
  • Journal article
    Hunter ED, Bumbar M, Amsler C, Bayo M, Breuker H, Cerwenka M, Costantini G, Ferragut R, Giammarchi M, Gligorova A, Gosta G, Hori M, Killian C, Kraxberger V, Kuroda N, Lanz A, Leali M, Maero G, Malbrunot C, Mascagna V, Matsuda Y, Migliorati S, Murtagh DJ, Romé M, Sheldon RE, Simon MC, Tajima M, Toso V, Ulmer S, Venturelli L, Weiser A, Widmann Eet al., 2026,

    Optimizing antihydrogen production via slow plasma merging

    , Physics of Plasmas, Vol: 33, ISSN: 1070-664X

    We present advances in plasma control and diagnosis, leading to the production of exceptionally large quantities of neutral antimatter. We measure the time-dependent temperature and density distribution of antiprotons and positrons while slowly combining them to make antihydrogen atoms in a nested Penning–Malmberg trap. The total antihydrogen yield and the number of atoms escaping the trap as a beam are greatest when the positron temperature is lowest and when antiprotons enter the positron plasma at the smallest radius. We control these parameters by changing the rate at which we lower the electrostatic barrier between the antiproton and positron plasmas and by heating the positrons. With the optimal settings, we produce 2.3 × 10<sup>6</sup> antihydrogen atoms per 15-min run, surpassing the previous state of the art (3.1 × 10<sup>4</sup> atoms in 4 min) and the most recent advances in other experiments by factors of 20 and 5, respectively.
  • Journal article
    Scandale W, Giroldi S, Hall G, Pesaresi M, Rossi R, Uchida K, Cerutti F, Esposito LS, Gilardoni S, Losito R, Galluccio F, Annucci D, Bauce M, Collamati F, Valente P, Variola A, Di Gennaro Set al., 2026,

    Bent crystal characterization from Autocollimator measurements

    , Journal of Instrumentation, Vol: 21

    Established in 2010, the UA9 Collaboration primarily studies the interactions of high-energy particles with bent silicon crystals using a specialized apparatus on the H8 beam line at CERN-SPS North Area. Crystals of various shapes are studied using high-energy beams of hadrons or leptons for purposes like crystal collimation, beam extraction, reducing hardware irradiation, and importantly, beam merging. The usual crystals are either tiny strips or rectangular slabs, bent along a main axis to create an orthogonal anticlastic response. We introduce an optical technique utilizing autocollimators to accurately determine the two crystal curvatures with an unmatched level of precision. Applying it to crystals addresses the challenge of rapid crystal curvature measurement in the lab, eliminating the trial and error method based on particle irradiation to significantly decrease the required beam time. Comparisons of the optical measurements with beam-based assessments demonstrate a significant similarity between the methods.
  • 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, 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, Ben-Haim E, Benane G, Bencivenni G, Berezhnoy A, Bernet R, Bernet Andres S, Bertolin A, Betti F, Bex J, Bezshyyko O, Bhattacharya S, Bhom J, Bieker MS, Biesuz NV, Biolchini A, Birch M, Bishop FCR, Bitadze A, Bizzeti A, Blake T, Blanc Fet al., 2026,

    Search for heavy neutral leptons in B-meson decays

    , Journal of High Energy Physics, Vol: 2026

    A search for long-lived heavy neutral leptons produced in B-meson decays and decaying to a μ<sup>±</sup>π<sup>∓</sup> final state is performed with data collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5 fb<sup>−1</sup>. The results are interpreted in both lepton-number-conserving and lepton-number-violating scenarios. No significant excess is observed. Constraints are placed on the squared mixing element |U<inf>μN</inf>|<sup>2</sup> to the active muon neutrino, under the assumption that couplings to other lepton flavours are negligible, in the mass range of 1.6–5.5 GeV.
  • Journal article
    Campagnari C, Cho S, Choi S, Chung S, Citron M, De Los Santos R, De Roeck A, Gastal M, Ha S, Haas A, Hill CS, Hong BJ, Hwang H, Hwang I, Jeong H, Kim M, Moon H, Padmanaban J, Schmitz R, Seo C, Stuart D, Tafoya Vargas JS, Won E, Yoo JH, Yoo J, Youssef A, Zaraket A, Zaraket H, Zheng Cet al., 2026,

    Afterpulse Prediction for the SUB-Millicharge ExperimenT (SUBMET)

    , Progress of Theoretical and Experimental Physics, Vol: 2026

    The SUB-Millicharge ExperimenT (SUBMET) investigates an unexplored parameter spaceof millicharged particles with mass m<inf>χ</inf> < 1.6 GeV/c2 and charge Q<inf>χ</inf> < 10<sup>−3</sup> e. The detec-tor consists of an Eljen-200 plastic scintillator coupled to a Hamamatsu Photonics R7725photomultiplier tube (PMT). PMT afterpulses, delayed pulses produced after an energeticpulse, have been observed in the SUBMET readout system, especially following primarypulses with a large area. We present a prediction method for afterpulse rates based onmeasurable parameters, which reproduces the observed rate with approximately 20% pre-cision. This approach enables a better understanding of afterpulse contributions and, con-sequently, improves the reliability of background predictions
  • Journal article
    Abbaslu S, Abud AA, Acciarri R, Accorsi LP, Acero MA, Adames MR, Adamov G, Adamowski M, Adriano C, Akbar F, Alemanno F, Alex NS, Allison K, Alrashed M, Alton A, Alvarez R, Alves T, Aman A, Amar H, Amedo P, Anderson J, Andrade DA, Andreopoulos C, Andreotti M, Andrews MP, Andrianala F, Andringa S, Anjarazafy F, Ansarifard S, Antic D, Antoniassi M, Aranda-Fernandez A, Arellano L, Diaz EA, Arroyave MA, Arteropons M, Asaadi J, Ascencio M, Ashkenazi A, Asner D, Asquith L, Atkin E, Auguste D, Aurisano A, Aushev V, Autiero D, Gómez DÁ, Azam MB, Azfar F, Back A, Back JJ, Bae Y, Bagaturia I, Bagby L, Baigarashev D, Balasubramanian S, Balboni A, Baldi P, Baldini W, Baldonedo J, Baller B, Bambah B, Barao F, Barbu D, Barenboim G, Alzás PB, Barker GJ, Barkhouse W, Barr G, Barros A, Barros N, Barrow D, Barrow JL, Basharina-Freshville A, Bashyal A, Basque V, Bassani M, Basu D, Batchelor C, Bathe-Peters L, Battat JBR, Battisti F, Bautista J, Bay F, Alba JLLB, Beacom JF, Bechetoille E, Behera B, Belchior E, Bell B, Bell G, Bellantoni L, Bellettini G, Bellini V, Beltramello O, Belyaev A, Montiel CB, Benjamin D, Neves FB, Berger Jet al., 2026,

    Operation of a Modular 3D-Pixelated Liquid Argon Time-Projection Chamber in a Neutrino Beam

    , Instruments, Vol: 10

    The 2x2 Demonstrator, a prototype for the Deep Underground Neutrino Experiment (DUNE) liquid argon (LAr) Near Detector, was exposed to the Neutrinos from the Main Injector (NuMI) neutrino beam at Fermi National Accelerator Laboratory (Fermilab). This detector is a prototype of a new modular design for a liquid argon time-projection chamber (LArTPC), comprising a two-by-two array of four modules, each further segmented into two optically isolated LArTPCs. The 2x2 Demonstrator features a number of pioneering technologies, including a low-profile resistive field shell to establish drift fields, native 3D ionization pixelated imaging, and a high-coverage dielectric light readout system. The 2.4-tonne active mass detector is flanked upstream and downstream by supplemental solid-scintillator tracking planes, repurposed from the MINERvA experiment, which track ionizing particles exiting the argon volume. The antineutrino beam data collected by the detector over a 4.5 day period in 2024 include over 30,000 neutrino interactions in the LAr active volume—the first neutrino interactions reported by a DUNE detector prototype. During its physics-quality run, the 2x2 Demonstrator operated at a nominal drift field of 500 V/cm and maintained good LAr purity, with a stable electron lifetime of approximately 1.25 ms. This paper describes the detector and supporting systems, summarizes the installation and commissioning, and presents the initial validation of collected NuMI beam and off-beam self-triggers. In addition, it highlights observed interactions in the detector volume, including candidate muon antineutrino events.
  • 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, Schwarz D, Schöfbeck R, 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., 2026,

    Model-independent measurement of the Higgs boson associated production with two jets and decaying to a pair of W bosons in proton-proton collisions at s=13 TeV

    , Journal of High Energy Physics, Vol: 2026

    A model-independent measurement of the differential production cross section of the Higgs boson decaying into a pair of W bosons, with a final state including two jets produced in association, is presented. In the analysis, events are selected in which the decay products of the two W bosons consist of an electron, a muon, and missing transverse momentum. The model independence of the measurement is maximized by employing a discriminating variable, developed through machine learning, that is agnostic to the signal hypothesis. The analysis is based on proton-proton collision data at s=13 TeV collected with the CMS detector from 2016–2018, corresponding to an integrated luminosity of 138 fb<sup>−1</sup>. The production cross section is measured as a function of the difference in azimuthal angle between the two jets. The differential cross section measurements are used to constrain Higgs boson couplings within the standard model effective field theory framework.
  • 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, Schwarz D, Schöfbeck R, 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 H, Carvalho Wet al., 2026,

    Measurements of tt¯W differential cross sections and the leptonic charge asymmetry at s=13 TeV

    , Journal of High Energy Physics, Vol: 2026

    Measurements of properties of top quark-antiquark pair production in association with a W boson in proton-proton collisions at a center-of-mass energy of 13 TeV are presented, using a data sample corresponding to an integrated luminosity of 138 fb<sup>−1</sup>, recorded by the CMS experiment at the CERN LHC. Events are selected based on the presence of either two leptons with the same electric charge or three leptons, and multiple jets and b-tagged jets. We present measurements of differential production cross sections as a function of kinematic variables sensitive to different aspects of the process modeling, using a multivariate discriminator in the two-lepton selection region and a simple selection-based method in the three-lepton region. The normalized cross section measurements are generally consistent with the standard model expectations, while we observe larger values compared to the expectations in the absolute cross section measurements, consistent with previous inclusive cross section measurements. In addition, we measure the leptonic charge asymmetry of this process, obtaining an observed value of Acℓ=−0.19−0.18+0.16, consistent with the expectation of −0.085 ± 0.006 predicted by next-to-leading order simulations.
  • 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, Schwarz D, Schöfbeck R, 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., 2026,

    Probing the flavour structure of dimension-6 EFT operators in multilepton final states in proton-proton collisions at s=13 TeV

    , Journal of High Energy Physics, Vol: 2026

    An analysis of the flavour structure of dimension-6 effective field theory (EFT) operators in multilepton final states is presented, focusing on the interactions of quarks with Z bosons. For the first time, the flavour structure of these operators is disentangled by simultaneously probing the interactions with different quark generations. The analysis targets the associated production of a top quark pair and a Z boson, as well as diboson processes in final states with at least three leptons, which can be electrons or muons. The data were recorded by the CMS experiment in the years 2016–2018 in proton-proton collisions at a centre-of-mass energy of 13 TeV and correspond to an integrated luminosity of 138 fb<sup>−1</sup>. Consistency with the standard model of particle physics is observed and limits are set on the selected Wilson coefficients, split into couplings to light- and heavy-quark generations.
  • 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, Schwarz D, Schöfbeck R, 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, Marckx D, Skovpen K, Tomaru AM, 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, Gameiro Casalinho F, 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 WLet al., 2026,

    Search for low-mass hidden-valley dark showers with non-prompt muon pairs in proton-proton collisions at s=13 TeV

    , Journal of High Energy Physics, Vol: 2026

    A search for signatures of a dark analog to quantum chromodynamics is performed. The analysis targets long-lived dark mesons that decay into standard-model particles, with a high branching fraction of the dark mesons decaying into muons. The dark mesons are formed by the hadronisation of dark partons, which are produced by a decay of the Higgs boson. The search is performed using a data set corresponding to an integrated luminosity of 41.6 fb<sup>−1</sup>, which was collected in proton-proton collisions at s=13 TeV by the CMS experiment at the CERN LHC in 2018 using non-prompt muon triggers. The search is based on resonant muon pair signatures. Machine-learning techniques are employed in the analysis, utilising boosted decision trees to discriminate between signal and background. No significant excess is observed above the standard model expectation. Upper limits on the branching fraction of the Higgs boson decaying to dark partons are determined to be as low as 10<sup>−4</sup> at 95% confidence level, surpassing and extending the existing limits on models with dark ω~ mesons for mean proper decay lengths of less than 500 mm and for ω~ masses down to 0.3 GeV. First limits are set for extended dark-shower models with two dark flavours that contain dark photons, probing their masses down to 0.33 GeV.

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