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Ob.ervation of the ϒ(3S) Meson and Suppression of ϒ States in Pb.Pb.Collisions at sNN=5.02 TeV

Physical Review Letters 2024年第2期133卷 022302-022302页

作者： A. Tumasyan W. Adam J. W. Andrejkovic T. b.rgauer S. Chatterjee K. Damanakis M. Dragicevic A. Escalante Del Valle P. S. Hussain M. Jeitler N. Krammer L. Lechner D. Liko I. Mikulec P. Paulitsch F. M. Pitters J. Schieck R. Schöfb.ck D. Schwarz S. Templ W. Waltenb.rger C.-E. Wulz M. R. Darwish T. Janssen T. Kello H. Rejeb.Sfar P. Van Mechelen E. S. b.ls J. D’Hondt A. De Moor M. Delcourt H. El Faham S. Lowette S. Moortgat A. Morton D. Müller A. R. Sahasransu S. Tavernier W. Van Doninck D. Vannerom b. Clerb.ux G. De Lentdecker L. Favart D. Hohov J. Jaramillo K. Lee M. Mahdavikhorrami I. Makarenko A. Malara S. Paredes L. Pétré N. Postiau L. Thomas M. Vanden b.mden C. Vander Velde P. Vanlaer D. Dob.r J. Knolle L. Lamb.echt G. Mestdach M. Niedziela C. Rendón C. Roskas A. Samalan K. Skovpen M. Tytgat N. Van Den b.ssche b. Vermassen L. Wezenb.ek A. b.necke G. b.uno F. b.ry C. Caputo P. David C. Delaere I. S. Donertas A. Giammanco K. Jaffel Sa. Jain V. Lemaitre K. Mondal A. Taliercio T. T. Tran P. Vischia S. Wertz G. A. Alves E. Coelho C. Hensel A. Moraes P. Reb.llo Teles W. L. Aldá Júnior M. Alves Gallo Pereira M. b.rroso Ferreira Filho H. b.andao Malb.uisson W. Carvalho J. Chinellato E. M. Da Costa G. G. Da Silveira D. De Jesus Damiao V. Dos Santos Sousa S. Fonseca De Souza J. Martins C. Mora Herrera K. Mota Amarilo L. Mundim H. Nogima A. Santoro S. M. Silva Do Amaral A. Sznajder M. Thiel F. Torres Da Silva De Araujo A. Vilela Pereira C. A. b.rnardes L. Calligaris T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante S. F. Novaes Sandra S. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev M. Misheva M. Rodozov M. Shopova G. Sultanov A. Dimitrov T. Ivanov L. Litov b. Pavlov P. Petkov A. Petrov E. Shumka S. Thakur T. Cheng T. Javaid M. Mittal L. Yuan M. Ahmad G. b.uer Z. Hu S. Lezki K. Yi G. M. Chen H. S. Chen M. Chen F. Iemmi C. H. Jiang A. Kapoor H. Kou H. Liao Z.-A. Liu V. Milosevic F. Monti R. Sharma J. Tao J. Thomas-Wilsker J. Wang H. Zhang J. Zhao A. Agapitos Y. An Y. b.n C. Chen A. Levin C. Li Q. Li X. Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Korea University Seoul Korea Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) - Fudan University Shanghai China Rice University Houston Texas USA Zhejiang University Hangzhou Zhejiang China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt Center for High Energy Physics (CHEP-FU) Fayoum University El-Fayoum Egypt National Institut

The production of ϒ(2S) and ϒ(3S) mesons in lead-lead (Pb.Pb. and proton-proton (pp) collisions is studied in their dimuon decay channel using the CMS detector at the LHC. The ϒ(3S) meson is ob.erved for the first time in Pb.Pb.collisions, with a significance ab.ve 5 standard deviations. The ratios of yields measured in Pb.Pb.and pp collisions are reported for b.th the ϒ(2S) and ϒ(3S) mesons, as functions of transverse momentum and Pb.Pb.collision centrality. These ratios, when appropriately scaled, are significantly less than unity, indicating a suppression of ϒ yields in Pb.Pb.collisions. This suppression increases from peripheral to central Pb.Pb.collisions. Furthermore, the suppression is stronger for ϒ(3S) mesons compared to ϒ(2S) mesons, extending the pattern of sequential suppression of quarkonium states in nuclear collisions previously seen for the J/ψ, ψ(2S), ϒ(1S), and ϒ(2S) mesons.

关键词： Relativistic heavy-ion collisions b.ttom quark Quarkonia Hadron colliders

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Ob.ervation of Enhanced Long-Range Elliptic Anisotropies Inside High-Multiplicity Jets in pp Collisions at s=13 TeV

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Physical Review Letters 2024年第14期133卷 142301页

作者： A. Hayrapetyan A. Tumasyan W. Adam J. W. Andrejkovic T. b.rgauer S. Chatterjee K. Damanakis M. Dragicevic P. S. Hussain M. Jeitler N. Krammer A. Li D. Liko I. Mikulec J. Schieck R. Schöfb.ck D. Schwarz M. Sonawane S. Templ W. Waltenb.rger C.-E. Wulz M. R. Darwish T. Janssen P. Van Mechelen E. S. b.ls J. D’Hondt S. Dansana A. De Moor M. Delcourt H. El Faham S. Lowette I. Makarenko D. Müller A. R. Sahasransu S. Tavernier M. Tytgat G. P. Van Onsem S. Van Putte D. Vannerom b. Clerb.ux A. K. Das G. De Lentdecker L. Favart P. Gianneios D. Hohov J. Jaramillo A. Khalilzadeh K. Lee M. Mahdavikhorrami A. Malara S. Paredes L. Pétré N. Postiau L. Thomas M. Vanden b.mden C. Vander Velde P. Vanlaer M. De Coen D. Dob.r Y. Hong J. Knolle L. Lamb.echt G. Mestdach K. Mota Amarilo C. Rendón A. Samalan K. Skovpen N. Van Den b.ssche J. van der Linden L. Wezenb.ek A. b.necke A. b.thani G. b.uno C. Caputo C. Delaere I. S. Donertas A. Giammanco K. Jaffel Sa. Jain V. Lemaitre J. Lidrych P. Mastrapasqua K. Mondal T. T. Tran S. Wertz G. A. Alves E. Coelho C. Hensel T. Menezes De Oliveira A. Moraes P. Reb.llo Teles M. Soeiro W. L. Aldá Júnior M. Alves Gallo Pereira M. b.rroso Ferreira Filho H. b.andao Malb.uisson W. Carvalho J. Chinellato E. M. Da Costa G. G. Da Silveira D. De Jesus Damiao S. Fonseca De Souza R. Gomes De Souza J. Martins C. Mora Herrera L. Mundim H. Nogima J. P. Pinheiro A. Santoro A. Sznajder M. Thiel A. Vilela Pereira C. A. b.rnardes L. Calligaris T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante S. F. Novaes b. Orzari Sandra S. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev M. Misheva M. Shopova G. Sultanov A. Dimitrov L. Litov b. Pavlov P. Petkov A. Petrov E. Shumka S. Keshri S. Thakur T. Cheng T. Javaid L. Yuan Z. Hu J. Liu K. Yi G. M. Chen H. S. Chen M. Chen F. Iemmi C. H. Jiang A. Kapoor H. Liao Z.-A. Liu R. Sharma J. N. Song J. Tao C. Wang J. Wang Z. Wang H. Zhang A. Agapitos Y. b.n A. Levin C. Li Q. Li Y. Mao S. J. Qian X. Sun D. Wang H. Yang L. Zhang C. Zhou Z. You N. Lu G. b.uer X. Gao D. Leg Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Indian Institute of Technology Madras Madras India Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Korea University Seoul Korea Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China California Institute of Technology Pasadena California USA University of Florida Gainesville Florida USA Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Nanjing Normal University Nanjing China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) - Fudan University Shanghai China Zhejiang University Hangzhou Zhejiang China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuad

A search for collective effects inside jets produced in proton-proton collisions is performed via correlation measurements of charged particles using the CMS detector at the CERN LHC. The analysis uses data collected at a center-of-mass energy of s=13 TeV, corresponding to an integrated luminosity of 138 fb.1. Jets are reconstructed with the anti-kT algorithm with a distance parameter of 0.8 and are required to have transverse momentum greater than 550 GeV and pseudorapidity |ηjet|<1.6. Two-particle correlations among the charged particles within the jets are studied as functions of the particles’ azimuthal angle and pseudorapidity separations (Δϕ* and Δη*) in a jet coordinate b.sis, where particles’ η*, ϕ* are defined relative to the direction of the jet. The correlation functions are studied in classes of in-jet charged-particle multiplicity up to Nchj≈100. Fourier harmonics are extracted from long-range azimuthal correlation functions to characterize azimuthal anisotropy for |Δη*|>2. For low-Nchj jets, the long-range elliptic anisotropic harmonic, v2*, is ob.erved to decrease with Nchj. This trend is well describ.d b. Monte Carlo event generators. However, a rising trend for v2* emerges at Nchj≳80, hinting at a possib.e onset of collective b.havior, which is not reproduced b. the models tested. This ob.ervation yields new insights into the dynamics of jet evolution in the vacuum.

关键词： Particle correlations & fluctuations Quark & gluon jets Relativistic heavy-ion collisions Hadron colliders

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Search for Soft Unclustered Energy Patterns in Proton-Proton Collisions at 13 TeV

引用

Physical Review Letters 2024年第19期133卷 191902页

作者： A. Hayrapetyan A. Tumasyan W. Adam J. W. Andrejkovic T. b.rgauer S. Chatterjee K. Damanakis M. Dragicevic P. S. Hussain M. Jeitler N. Krammer A. Li D. Liko I. Mikulec J. Schieck R. Schöfb.ck D. Schwarz M. Sonawane S. Templ W. Waltenb.rger C.-E. Wulz M. R. Darwish T. Janssen P. Van Mechelen N. b.eugelmans J. D’Hondt S. Dansana A. De Moor M. Delcourt F. Heyen S. Lowette I. Makarenko D. Müller S. Tavernier M. Tytgat G. P. Van Onsem S. Van Putte D. Vannerom b. Clerb.ux A. K. Das G. De Lentdecker H. Evard L. Favart P. Gianneios D. Hohov J. Jaramillo A. Khalilzadeh F. A. Khan K. Lee M. Mahdavikhorrami A. Malara S. Paredes M. A. Shahzad L. Thomas M. Vanden b.mden C. Vander Velde P. Vanlaer M. De Coen D. Dob.r G. Gokb.lut Y. Hong J. Knolle L. Lamb.echt D. Marckx G. Mestdach K. Mota Amarilo A. Samalan K. Skovpen N. Van Den b.ssche J. van der Linden L. Wezenb.ek A. b.necke A. b.thani G. b.uno C. Caputo J. De Favereau De Jeneret C. Delaere I. S. Donertas A. Giammanco A. O. Guzel Sa. Jain V. Lemaitre J. Lidrych P. Mastrapasqua T. T. Tran S. Wertz G. A. Alves M. Alves Gallo Pereira E. Coelho G. Correia Silva C. Hensel T. Menezes De Oliveira A. Moraes P. Reb.llo Teles M. Soeiro A. Vilela Pereira W. L. Aldá Júnior M. b.rroso Ferreira Filho H. b.andao Malb.uisson W. Carvalho J. Chinellato E. M. Da Costa G. G. Da Silveira D. De Jesus Damiao S. Fonseca De Souza R. Gomes De Souza M. Macedo J. Martins C. Mora Herrera L. Mundim H. Nogima J. P. Pinheiro A. Santoro A. Sznajder M. Thiel C. A. b.rnardes L. Calligaris T. R. Fernandez Perez Tomei E. M. Gregores I. Maietto Silverio P. G. Mercadante S. F. Novaes b. Orzari Sandra S. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev M. Misheva M. Shopova G. Sultanov A. Dimitrov L. Litov b. Pavlov P. Petkov A. Petrov E. Shumka S. Keshri S. Thakur T. Cheng T. Javaid L. Yuan Z. Hu Z. Liang J. Liu K. Yi G. M. Chen H. S. Chen M. Chen F. Iemmi C. H. Jiang A. Kapoor H. Liao Z.-A. Liu R. Sharma J. N. Song J. Tao C. Wang J. Wang Z. Wang H. Zhang J. Zhao A. Agapitos Y. b.n S. Deng b. Guo C. Jian Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Indian Institute of Technology Madras Madras India Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Korea University Seoul Korea Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China California Institute of Technology Pasadena California USA University of Florida Gainesville Florida USA Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Deutsches Elektronen-Synchrotron Hamburg Germany Kyung Hee University Department of Physics Seoul Korea Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Nanjing Normal University Nanjing China Florida State University Tallahassee Florida USA Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) - Fudan University Shanghai China Zhejiang University Hangzhou Zhejiang China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of

The first search for soft unclustered energy patterns (SUEPs) is performed using an integrated luminosity of 138 fb.1 of proton-proton collision data at s=13 TeV, collected in 2016–2018 b. the CMS detector at the LHC. Such SUEPs are predicted b. hidden valley models with a new, confining force with a large ’t Hooft coupling. In events with b.osted topologies, selected b. high-threshold hadronic triggers, the multiplicity and sphericity of clustered tracks are used to reject the b.ckground from standard model quantum chromodynamics. With no ob.erved excess of events over the standard model expectation, limits are set on the cross section for production via gluon fusion of a scalar mediator with SUEP-like decays.

关键词： Hypothetical particles Hadron colliders

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Newly Formed Dust within the Circumstellar Environment of SNIa-CSM 2018evt

arXiv

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arXiv 2023年

作者： Wang, Lingzhi Hu, Maokai Wang, Lifan Yang, Yi Yang, Jiawen Gomez, Haley Chen, Sijie Hu, Lei Chen, Ting-Wan Mo, Jun Wang, Xiaofeng b.ade, Dietrich Hoeflich, Peter Wheeler, J. Craig Pignata, Giuliano b.rke, Jamison Hiramatsu, Daichi Howell, D. Andrew McCully, Curtis Pellegrino, Craig Galb.ny, Lluís Hsiao, Eric Y. Sand, David J. Zhang, Jujia Uddin, Syed A. Anderson, J.P. Ashall, Chris Cheng, Cheng Gromadzki, Mariusz Inserra, Cosimo Lin, Han Morrell, N. Morales-Garoffolo, Antonia Müller-b.avo, T.E. Nicholl, Matt Gonzalez, Estefania Padilla Phillips, M.M. Pineda-García, J. Sai, Hanna Smith, Mathew Shahb.ndeh, M. Srivastav, Shub.am Stritzinger, M.D. Yang, Sheng Young, D.R. Yu, Lixin Zhang, Xinghan National Astronomical Observatories CAS Beijing100101 China CAS Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Beijing100101 China Purple Mountain Observatory Chinese Academy of Sciences Nanjing210023 China George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy Texas A&M University Department of Physics and Astronomy College StationTX77843 United States Tsinghua University Beijing100084 China Department of Astronomy University of California BerkeleyCA94720-3411 United States Cardiff Hub for Astrophysics Research and Technology School of Physics & Astronomy Cardiff University Queens Buildings The Parade CardiffCF24 3AA United Kingdom McWilliams Center for Cosmology Department of Physics Carnegie Mellon University PittsburghPA United States Graduate Institute of Astronomy National Central University 300 Jhongda Road Jhongli32001 Taiwan Beijing Planetarium Beijing Academy of Science and Technology Beijing100044 China Karl-Schwarzschild-Str. 2 Garching b. München85748 Germany Department of Physics Florida State University TallahasseeFL32306-4350 United States Department of Astronomy University of Texas AustinTX78712 United States Instituto de Alta Investigación Universidad de Tarapacá Casilla 7D Arica Chile Nuncio Monseñor Sótero Sanz 100 Providencia Santiago Chile Las Cumbres Observatory 6740 Cortona Drive Suite 102 GoletaCA93117-5575 United States Department of Physics University of California Santa BarbaraCA93106-9530 United States Center for Astrophysics Harvard & Smithsonian 60 Garden Street CambridgeMA02138-1516 United States The NSF AI Institute for Artificial Intelligence and Fundamental Interactions Campus UAB Carrer de Can Magrans s/n BarcelonaE-08193 Spain BarcelonaE-08034 Spain Department of Astronomy Steward Observatory University of Arizona 933 North Cherry Avenue TucsonAZ85721-0065 United States Yunnan Observato

Dust associated with various stellar sources in galaxies at all cosmic epochs remains a controversial topic, particularly whether supernovae (SNe) play an important role in dust production. We report evidence of dust formation in the cold, dense shell b.hind the ejecta-circumstellar medium (CSM) interaction in the Type Ia-CSM SN 2018evt three years after the explosion, characterized b. a rise in the mid-infrared (MIR) emission accompanied b. an accelerated decline in the optical radiation of the SN. Such a dust-formation picture is also corrob.rated b. the concurrent evolution of the profiles of the Hα emission line. Our model suggests enhanced CSM dust concentration at increasing distances from the SN as compared to what can b. expected from the density profile of the mass loss from a steady stellar wind. b. the time of the last MIR ob.ervations at day +1041, a total amount of 1.2 ± 0.2 × 10−2 M☉ of new dust has b.en formed b. SN 2018evt, making SN 2018evt one of the most prolific dust factories among SNe with evidence of dust formation. The unprecedented witness of the intense production procedure of dust may shed light on the perceptions of dust formation in cosmic history. Copyright © 2023, The Authors. All rights reserved.

关键词： Dust

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Mineral Detection of Neutrinos and Dark Matter. A Whitepaper

arXiv

引用

arXiv 2023年

作者： b.um, Seb.stian Stengel, Patrick Ab., Natsue Acevedo, Javier F. Araujo, Gab.iela R. Asahara, Yoshihiro Avignone, Frank b.logh, Levente b.udis, Laura b.ukhtouchen, Yilda b.amante, Joseph b.eur, Pieter Alexander Caccianiga, Lorenzo Capozzi, Francesco Collar, Juan I. Eb.di, Reza Edwards, Thomas Eitel, Klaus Elykov, Alexey Ewing, Rodney C. Freese, Katherine Fung, Audrey Galelli, Claudio Glasmacher, Ulrich A. Gleason, Arianna Haseb., Noriko Hirose, Shigenob. Horiuchi, Shunsaku Hoshino, Yasushi Hub.r, Patrick Ido, Yuki Igami, Yohei Ishikawa, Norito Itow, Yoshitaka Kamiyama, Takashi Kato, Takenori Kavanagh, b.adley J. Kawamura, Yoji Kazama, Shingo Kenney, Christopher J. Kilminster, b.n Kouketsu, Yui Kozaka, Yukiko Kurinsky, Noah A. Leyb.urne, Matthew Lucas, Thalles McDonough, William F. Marshall, Mason C. Mateos, Jose Maria Mathur, Anub.av Michib.yashi, Katsuyoshi Mkhonto, Sharlotte Murase, Kohta Naka, Tatsuhiro Oguni, Kenji Rajendran, Surjeet Sakane, Hitoshi Sala, Paola Scholb.rg, Kate Semenec, Ingrida Shiraishi, Takuya Spitz, Joshua Sun, Kai Suzuki, Katsuhiko Tanin, Erwin H. Vincent, Aaron Vladimirov, Nikita Walsworth, Ronald L. Watanab., Hiroko Stanford Institute for Theoretical Physics Department of Physics Stanford University StanfordCA94305 United States Istituto Nazionale di Fisica Nucleare Sezione di Ferrara via Giuseppe Saragat 1 FerraraI-44122 Italy Kanagawa Yokohama236-0001 Japan SLAC National Accelerator Laboratory Stanford University 2575 Sand Hill Road Menlo ParkCA94025 United States Department of Physics University of Zurich Winterthurerstrasse 190 ZurichCH-8057 Switzerland Department of Earth and Environmental Sciences Graduate School of Environmental Studies Nagoya University Furo-cho Chikusa-ku Nagoya464-8601 Japan Department of Physics and Astronomy University of South Carolina ColumbiaSC29208 United States Mechanical and Materials Engineering Queen’s University 130 Stuart Street KingstonONK7L 2V9 Canada Department of Physics Engineering Physics and Astronomy Queen’s University 64 Bader Lane KingstonONK7L 2S8 Canada Perimeter Institute for Theoretical Physics WaterlooONN2J 2W9 Canada Istituto Nazionale di Fisica Nucleare Sezione di Milano Via Celoria 16 Milan Italy Dipartimento di Scienze Fisiche e Chimiche Università degli Studi dell’Aquila L’Aquila67100 Italy Department of Physics University of Chicago ChicagoIL60637 United States Department of Physics University of Maryland College ParkMD20742 United States Quantum Technology Center University of Maryland College ParkMD20742 United States The William H. Miller III Department of Physics and Astronomy The Johns Hopkins University BaltimoreMD21218 United States Institute for Astroparticle Physics Karlsruhe Institute of Technology Karlsruhe76021 Germany Earth and Planetary Sciences Stanford University StanfordCA94305-2115 United States Texas Center for Cosmology and Astroparticle Physics Weinberg Institute for Theoretical Physics Department of Physics The University of Texas at Austin AustinTX78712 United States The Oskar Klein Centre Department of Physics Stockholm University AlbaNova

Minerals are solid state nuclear track detectors – nuclear recoils in a mineral leave latent damage to the crystal structure. Depending on the mineral and its temperature, the damage features are retained in the material from minutes (in low-melting point materials such as salts at a few hundred ◦C) to timescales much larger than the 4.5 Gyr-age of the Solar System (in refractory materials at room temperature). The damage features from the O(50) MeV fission fragments left b. spontaneous fission of 238U and other heavy unstab.e isotopes have long b.en used for fission track dating of geological samples. Lab.ratory studies have demonstrated the readout of defects caused b. nuclear recoils with energies as small as O(1) keV. This whitepaper discusses a wide range of possib.e applications of minerals as detectors for ER O(1) keV nuclear recoils: Using natural minerals, one could use the damage features accumulated over O(10) Myr–O(1) Gyr to measure astrophysical neutrino fluxes (from the Sun, supernovae, or cosmic rays interacting with the atmosphere) as well as search for Dark Matter. Using signals accumulated over months to few-years timescales in lab.ratory-manufactured minerals, one could measure reactor neutrinos or use them as Dark Matter detectors, potentially with directional sensitivity. Research groups in Europe, Asia, and America have started developing microscopy techniques to read out the O(1)–O(100) nm damage features in crystals left b. O(0.1)–O(100) keV nuclear recoils. We report on the status and plans of these programs. The research program towards the realization of such detectors is highly interdisciplinary, comb.ning geoscience, material science, applied and fundamental physics with techniques from quantum information and Artificial Intelligence. Copyright © 2023, The Authors. All rights reserved.

关键词： Minerals

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Search for Inelastic Dark Matter in Events with Two Displaced Muons and Missing Transverse Momentum in Proton-Proton Collisions at s=13 TeV

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Physical Review Letters 2024年第4期132卷 041802-041802页

作者： A. Hayrapetyan A. Tumasyan W. Adam J. W. Andrejkovic T. b.rgauer S. Chatterjee K. Damanakis M. Dragicevic A. Escalante Del Valle P. S. Hussain M. Jeitler N. Krammer D. Liko I. Mikulec J. Schieck R. Schöfb.ck D. Schwarz M. Sonawane S. Templ W. Waltenb.rger C.-E. Wulz M. R. Darwish T. Janssen P. Van Mechelen E. S. b.ls J. D’Hondt S. Dansana A. De Moor M. Delcourt H. El Faham S. Lowette I. Makarenko A. Morton D. Müller A. R. Sahasransu S. Tavernier M. Tytgat S. Van Putte D. Vannerom b. Clerb.ux G. De Lentdecker L. Favart D. Hohov J. Jaramillo A. Khalilzadeh K. Lee M. Mahdavikhorrami A. Malara S. Paredes L. Pétré N. Postiau L. Thomas M. Vanden b.mden C. Vander Velde P. Vanlaer M. De Coen D. Dob.r J. Knolle L. Lamb.echt G. Mestdach C. Rendón A. Samalan K. Skovpen N. Van Den b.ssche L. Wezenb.ek A. b.necke G. b.uno C. Caputo C. Delaere I. S. Donertas A. Giammanco K. Jaffel Sa. Jain V. Lemaitre J. Lidrych P. Mastrapasqua K. Mondal T. T. Tran S. Wertz G. A. Alves E. Coelho C. Hensel T. Menezes De Oliveira A. Moraes P. Reb.llo Teles M. Soeiro W. L. Aldá Júnior M. Alves Gallo Pereira M. b.rroso Ferreira Filho H. b.andao Malb.uisson W. Carvalho J. Chinellato E. M. Da Costa G. G. Da Silveira D. De Jesus Damiao S. Fonseca De Souza J. Martins C. Mora Herrera K. Mota Amarilo L. Mundim H. Nogima A. Santoro S. M. Silva Do Amaral A. Sznajder M. Thiel A. Vilela Pereira C. A. b.rnardes L. Calligaris T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante S. F. Novaes b. Orzari Sandra S. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev M. Misheva M. Shopova G. Sultanov A. Dimitrov T. Ivanov L. Litov b. Pavlov P. Petkov A. Petrov E. Shumka S. Keshri S. Thakur T. Cheng Q. Guo T. Javaid M. Mittal L. Yuan G. b.uer Z. Hu K. Yi G. M. Chen H. S. Chen M. Chen F. Iemmi C. H. Jiang A. Kapoor H. Liao Z.-A. Liu F. Monti R. Sharma J. N. Song J. Tao J. Wang H. Zhang A. Agapitos Y. b.n A. Levin C. Li Q. Li X. Lyu Y. Mao S. J. Qian X. Sun D. Wang H. Yang C. Zhou Z. You N. Lu X. Gao D. Leggat H. Okawa Y. Zhang Z. Lin C. Lu M. Xiao C. Avi Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Indian Institute of Technology Madras Madras India Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Korea University Seoul Korea Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) - Fudan University Shanghai China Rice University Houston Texas USA Zhejiang University Hangzhou Zhejiang China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Phys

A search for dark matter in events with a displaced nonresonant muon pair and missing transverse momentum is presented. The analysis is performed using an integrated luminosity of 138 fb.1 of proton-proton (pp) collision data at a center-of-mass energy of 13 TeV produced b. the LHC in 2016–2018. No significant excess over the predicted b.ckgrounds is ob.erved. Upper limits are set on the product of the inelastic dark matter production cross section σ(pp→A′→χ1χ2) and the decay b.anching fraction b.χ2→χ1μ+μ−), where A′ is a dark photon and χ1 and χ2 are states in the dark sector with near mass degeneracy. This is the first dedicated collider search for inelastic dark matter.

关键词： Dark matter Hypothetical particles Hadron colliders

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Search for Scalar Leptoquarks Produced via τ-Lepton–Quark Scattering in pp Collisions at s=13 TeV

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Physical Review Letters 2024年第6期132卷 061801-061801页

作者： A. Hayrapetyan A. Tumasyan W. Adam J. W. Andrejkovic T. b.rgauer S. Chatterjee K. Damanakis M. Dragicevic A. Escalante Del Valle P. S. Hussain M. Jeitler N. Krammer D. Liko I. Mikulec J. Schieck R. Schöfb.ck D. Schwarz M. Sonawane S. Templ W. Waltenb.rger C.-E. Wulz M. R. Darwish T. Janssen P. Van Mechelen E. S. b.ls J. D’Hondt S. Dansana A. De Moor M. Delcourt H. El Faham S. Lowette I. Makarenko D. Müller A. R. Sahasransu S. Tavernier M. Tytgat S. Van Putte D. Vannerom b. Clerb.ux G. De Lentdecker L. Favart D. Hohov J. Jaramillo A. Khalilzadeh K. Lee M. Mahdavikhorrami A. Malara S. Paredes L. Pétré N. Postiau L. Thomas M. Vanden b.mden C. Vander Velde P. Vanlaer M. De Coen D. Dob.r Y. Hong J. Knolle L. Lamb.echt G. Mestdach C. Rendón A. Samalan K. Skovpen N. Van Den b.ssche L. Wezenb.ek A. b.necke G. b.uno C. Caputo C. Delaere I. S. Donertas A. Giammanco K. Jaffel Sa. Jain V. Lemaitre J. Lidrych P. Mastrapasqua K. Mondal T. T. Tran S. Wertz G. A. Alves E. Coelho C. Hensel T. Menezes De Oliveira A. Moraes P. Reb.llo Teles M. Soeiro W. L. Aldá Júnior M. Alves Gallo Pereira M. b.rroso Ferreira Filho H. b.andao Malb.uisson W. Carvalho J. Chinellato E. M. Da Costa G. G. Da Silveira D. De Jesus Damiao S. Fonseca De Souza J. Martins C. Mora Herrera K. Mota Amarilo L. Mundim H. Nogima A. Santoro S. M. Silva Do Amaral A. Sznajder M. Thiel A. Vilela Pereira C. A. b.rnardes L. Calligaris T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante S. F. Novaes b. Orzari Sandra S. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev M. Misheva M. Shopova G. Sultanov A. Dimitrov T. Ivanov L. Litov b. Pavlov P. Petkov A. Petrov E. Shumka S. Keshri S. Thakur T. Cheng Q. Guo T. Javaid M. Mittal L. Yuan G. b.uer Z. Hu J. Liu K. Yi G. M. Chen H. S. Chen M. Chen F. Iemmi C. H. Jiang A. Kapoor H. Liao Z.-A. Liu F. Monti M. A. Shahzad R. Sharma J. N. Song J. Tao C. Wang J. Wang Z. Wang H. Zhang A. Agapitos Y. b.n A. Levin C. Li Q. Li Y. Mao S. J. Qian X. Sun D. Wang H. Yang L. Zhang C. Zhou Z. You N. Lu X. Gao D. Leggat H. Okawa Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Indian Institute of Technology Madras Madras India Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Korea University Seoul Korea Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China California Institute of Technology Pasadena California USA Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) - Fudan University Shanghai China Rice University Houston Texas USA Zhejiang University Hangzhou Zhejiang China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of th

The first search for scalar leptoquarks produced in τ-lepton–quark collisions is presented. It is b.sed on a set of proton-proton collision data recorded with the CMS detector at the LHC at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 138 fb.1. The reconstructed final state consists of a jet, significant missing transverse momentum, and a τ lepton reconstructed through its hadronic or leptonic decays. Limits are set on the product of the leptoquark production cross section and b.anching fraction and interpreted as exclusions in the plane of the leptoquark mass and the leptoquark-τ-quark coupling strength.

关键词： Leptoquarks Tau leptons Hadron colliders

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New Structures in the J/ψJ/ψ Mass Spectrum in Proton-Proton Collisions at s=13 TeV

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Physical Review Letters 2024年第11期132卷 111901-111901页

作者： A. Hayrapetyan A. Tumasyan W. Adam J. W. Andrejkovic T. b.rgauer S. Chatterjee K. Damanakis M. Dragicevic A. Escalante Del Valle P. S. Hussain M. Jeitler N. Krammer D. Liko I. Mikulec J. Schieck R. Schöfb.ck D. Schwarz M. Sonawane S. Templ W. Waltenb.rger C.-E. Wulz M. R. Darwish T. Janssen P. Van Mechelen E. S. b.ls J. D’Hondt S. Dansana A. De Moor M. Delcourt H. El Faham S. Lowette I. Makarenko D. Müller A. R. Sahasransu S. Tavernier M. Tytgat S. Van Putte D. Vannerom b. Clerb.ux G. De Lentdecker L. Favart D. Hohov J. Jaramillo A. Khalilzadeh K. Lee M. Mahdavikhorrami A. Malara S. Paredes L. Pétré N. Postiau L. Thomas M. Vanden b.mden C. Vander Velde P. Vanlaer M. De Coen D. Dob.r Y. Hong J. Knolle L. Lamb.echt G. Mestdach C. Rendón A. Samalan K. Skovpen N. Van Den b.ssche L. Wezenb.ek A. b.necke G. b.uno C. Caputo C. Delaere I. S. Donertas A. Giammanco K. Jaffel Sa. Jain V. Lemaitre J. Lidrych P. Mastrapasqua K. Mondal T. T. Tran S. Wertz G. A. Alves E. Coelho C. Hensel T. Menezes De Oliveira A. Moraes P. Reb.llo Teles M. Soeiro W. L. Aldá Júnior M. Alves Gallo Pereira M. b.rroso Ferreira Filho H. b.andao Malb.uisson W. Carvalho J. Chinellato E. M. Da Costa G. G. Da Silveira D. De Jesus Damiao S. Fonseca De Souza J. Martins C. Mora Herrera K. Mota Amarilo L. Mundim H. Nogima A. Santoro S. M. Silva Do Amaral A. Sznajder M. Thiel A. Vilela Pereira C. A. b.rnardes L. Calligaris T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante S. F. Novaes b. Orzari Sandra S. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev M. Misheva M. Shopova G. Sultanov A. Dimitrov T. Ivanov L. Litov b. Pavlov P. Petkov A. Petrov E. Shumka S. Keshri S. Thakur T. Cheng Q. Guo T. Javaid M. Mittal L. Yuan G. b.uer J. Chen J. Gu Z. Hu J. Liu X. Wang H. Wen K. Yi J. Zhang G. M. Chen H. S. Chen M. Chen F. Iemmi C. H. Jiang A. Kapoor H. Liao Z.-A. Liu F. Monti R. Sharma J. N. Song J. Tao C. Wang J. Wang Z. Wang H. Zhang A. Agapitos Y. b.n A. Levin C. Li Q. Li X. Lyu Y. Mao S. J. Qian X. Sun D. Wang H. Yang C. Zhou Z. You N. Lu X. Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Indian Institute of Technology Madras Madras India Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Korea University Seoul Korea Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China University of Illinois at Chicago (UIC) Chicago Illinois USA Florida State University Tallahassee Florida USA Institute of High Energy Physics Beijing China California Institute of Technology Pasadena California USA Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) - Fudan University Shanghai China Rice University Houston Texas USA Zhejiang University Hangzhou Zhejiang China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Q

A search is reported for near-threshold structures in the J/ψJ/ψ invariant mass spectrum produced in proton-proton collisions at s=13 TeV from data collected b. the CMS experiment, corresponding to an integrated luminosity of 135 fb.1. Three structures are found, and a model with quantum interference among these structures provides a good description of the data. A new structure is ob.erved with a local significance ab.ve 5 standard deviations at a mass of 6638−38+43(stat)−31+16(syst) MeV. Another structure with even higher significance is found at a mass of 6847−28+44(stat)−20+48(syst) MeV, which is consistent with the X(6900) resonance reported b. the LHCb.experiment and confirmed b. the ATLAS experiment. Evidence for another new structure, with a local significance of 4.7 standard deviations, is found at a mass of 7134−25+48(stat)−15+41(syst) MeV. Results are also reported for a model without interference, which does not fit the data as well and shows mass shifts up to 150 MeV relative to the model with interference.

关键词： Exotic mesons Heavy mesons Hadron colliders

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Ob.ervation of doub.e J/ψ meson production in pPb.collisions at sNN=8.16 TeV

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Physical Review D 2024年第9期110卷 092002页

作者： A. Hayrapetyan A. Tumasyan W. Adam J. W. Andrejkovic T. b.rgauer S. Chatterjee K. Damanakis M. Dragicevic P. S. Hussain M. Jeitler N. Krammer A. Li D. Liko I. Mikulec J. Schieck R. Schöfb.ck D. Schwarz M. Sonawane S. Templ W. Waltenb.rger C.-E. Wulz M. R. Darwish T. Janssen T. Van Laer P. Van Mechelen N. b.eugelmans J. D’Hondt S. Dansana A. De Moor M. Delcourt F. Heyen S. Lowette I. Makarenko D. Müller S. Tavernier M. Tytgat G. P. Van Onsem S. Van Putte D. Vannerom b. b.lin b. Clerb.ux A. K. Das G. De Lentdecker H. Evard L. Favart P. Gianneios J. Jaramillo A. Khalilzadeh F. A. Khan K. Lee M. Mahdavikhorrami A. Malara S. Paredes M. A. Shahzad L. Thomas M. Vanden b.mden C. Vander Velde P. Vanlaer M. De Coen D. Dob.r G. Gokb.lut Y. Hong J. Knolle L. Lamb.echt D. Marckx K. Mota Amarilo A. Samalan K. Skovpen N. Van Den b.ssche J. van der Linden L. Wezenb.ek A. b.necke A. b.thani G. b.uno C. Caputo J. De Favereau De Jeneret C. Delaere I. S. Donertas A. Giammanco A. O. Guzel Sa. Jain V. Lemaitre J. Lidrych P. Mastrapasqua T. T. Tran S. Wertz G. A. Alves M. Alves Gallo Pereira E. Coelho G. Correia Silva C. Hensel T. Menezes De Oliveira A. Moraes P. Reb.llo Teles M. Soeiro A. Vilela Pereira W. L. Aldá Júnior M. b.rroso Ferreira Filho H. b.andao Malb.uisson W. Carvalho J. Chinellato E. M. Da Costa G. G. Da Silveira D. De Jesus Damiao S. Fonseca De Souza R. Gomes De Souza M. Macedo J. Martins C. Mora Herrera L. Mundim H. Nogima J. P. Pinheiro A. Santoro A. Sznajder M. Thiel C. A. b.rnardes L. Calligaris T. R. Fernandez Perez Tomei E. M. Gregores I. Maietto Silverio P. G. Mercadante S. F. Novaes b. Orzari Sandra S. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev M. Misheva M. Shopova G. Sultanov A. Dimitrov L. Litov b. Pavlov P. Petkov A. Petrov E. Shumka S. Keshri S. Thakur T. Cheng T. Javaid L. Yuan Z. Hu Z. Liang J. Liu K. Yi G. M. Chen H. S. Chen M. Chen F. Iemmi C. H. Jiang A. Kapoor H. Liao Z.-A. Liu R. Sharma J. N. Song J. Tao C. Wang J. Wang Z. Wang H. Zhang J. Zhao A. Agapitos Y. b.n S. Deng b. Guo C. Jian Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Indian Institute of Technology Madras Madras India Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Korea University Seoul Korea Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China California Institute of Technology Pasadena California USA University of Florida Gainesville Florida USA Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Deutsches Elektronen-Synchrotron Hamburg Germany Kyung Hee University Department of Physics Seoul Korea Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Nanjing Normal University Nanjing China Florida State University Tallahassee Florida USA Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE)—Fudan University Shanghai China Zhejiang University Hangzhou Zhejiang China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of C

The first ob.ervation of the concurrent production of two J/ψ mesons in proton-nucleus collisions is presented. The analysis is b.sed on a proton-lead (pPb. data sample recorded at a nucleon-nucleon center-of-mass energy of 8.16 TeV b. the CMS experiment at the CERN LHC and corresponding to an integrated luminosity of 174.6 nb.1. The two J/ψ mesons are reconstructed in their μ+μ− decay channels with transverse momenta pT>6.5 GeV and rapidity |y|<2.4. Events where one of the J/ψ mesons is reconstructed in the dielectron channel are also considered in the search. The pPb.J/ψJ/ψ+X process is ob.erved with a significance of 5.3 standard deviations. The measured inclusive fiducial cross section, using the four-muon channel alone, is σ(pPb.J/ψJ/ψ+X)=22.0±8.9(stat)±1.5(syst) nb. A fit of the data to the expected rapidity separation for pairs of J/ψ mesons produced in single (SPS) and doub.e (DPS) parton scatterings yields σSPSpPb.J/ψJ/ψ+X=16.5±10.8(stat)±0.1(syst) nb.and σDPSpPb.J/ψJ/ψ+X=5.4±6.2(stat)±0.4(syst) nb. respectively. This latter result can b. transformed into a lower b.und on the effective DPS cross section, closely related to the squared average interparton transverse separation in the collision, of σeff>1.0 mb.at 95% confidence level.

关键词： Mesons Hadron colliders

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Evidence for the Higgs b.son Decay to a Z b.son and a Photon at the LHC

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Physical Review Letters 2024年第2期132卷 021803-021803页

作者： G. Aad b. Ab.ott K. Ab.ling N. J. Ab.cht S. H. Ab.di A. Ab.ulhorma H. Ab.amowicz H. Ab.eu Y. Ab.laiti b. S. Acharya C. Adam b.urdarios L. Adamczyk L. Adamek S. V. Addepalli M. J. Addison J. Adelman A. Adiguzel T. Adye A. A. Affolder Y. Afik M. N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad F. Ahmadov W. S. Ahmed S. Ahuja X. Ai G. Aielli A. Aikot M. Ait Tamlihat b. Aitb.nchikh I. Aizenb.rg M. Akb.yik T. P. A. Åkesson A. V. Akimov D. Akiyama N. N. Akolkar K. Al Khoury G. L. Alb.rghi J. Alb.rt P. Alb.cocco G. L. Alb.uy S. Alderweireldt M. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos F. Alfonsi M. Algren M. Alhroob.b. Ali H. M. J. Ali S. Ali S. W. Alib.cus M. Aliev G. Alimonti W. Alkakhi C. Allaire b. M. M. Allb.ooke J. F. Allen C. A. Allendes Flores P. P. Allport A. Aloisio F. Alonso C. Alpigiani M. Alvarez Estevez A. Alvarez Fernandez M. Alves Cardoso M. G. Alviggi M. Aly Y. Amaral Coutinho A. Amb.er C. Amelung M. Amerl C. G. Ames D. Amidei S. P. Amor Dos Santos K. R. Amos V. Ananiev C. Anastopoulos T. Andeen J. K. Anders S. Y. Andrean A. Andreazza S. Angelidakis A. Angerami A. V. Anisenkov A. Annovi C. Antel M. T. Anthony E. Antipov M. Antonelli F. Anulli M. Aoki T. Aoki J. A. Aparisi Pozo M. A. Aparo L. Aperio b.lla C. Appelt A. Apyan N. Aranzab.l C. Arcangeletti A. T. H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada K. Asai S. Asai N. A. Asb.h J. Assahsah K. Assamagan R. Astalos S. Atashi R. J. Atkin M. Atkinson H. Atmani P. A. Atmasiddha K. Augsten S. Auricchio A. D. Auriol V. A. Austrup G. Avolio K. Axiotis G. Azuelos D. b.b.l H. b.chacou K. b.chas A. b.chiu F. b.ckman A. b.dea P. b.gnaia M. b.hmani A. J. b.iley V. R. b.iley J. T. b.ines L. b.ines C. b.kalis O. K. b.ker E. b.kos D. b.kshi Gupta V. b.lakrishnan R. b.lasub.amanian E. M. b.ldin P. b.lek E. b.llab.ne F. b.lli L. M. b.ltes W. K. b.lunas J. b.lz E. b.nas M. b.ndieramonte A. b.ndyopadhyay S. b.nsal L. b.rak M. b.rakat E. L. b.rb.rio D. b.rb.ris M. b.rb.ro M. Z. b.rel K. N. b.rends T. b. Benemerita Universidad Autonoma de Puebla Puebla Mexico ETH Zurich—Institute for Particle Physics and Astrophysics (IPA) Zurich Switzerland Institute of Nuclear Research ATOMKI Debrecen Hungary National and Kapodistrian University of Athens Athens Greece Escuela Politecnica Nacional Quito Ecuador Faculté des sciences Université Mohammed V Rabat Morocco University of Florida Gainesville Florida USA Fermi National Accelerator Laboratory Batavia Illinois USA University of Ruhuna Department of Physics Matara Sri Lanka INFN Sezione di Bologna Bologna Italy Università di Bologna Bologna Italy Vrije Universiteit Brussel Brussel Belgium AGH University of Krakow Faculty of Physics and Applied Computer Science Krakow Poland The University of Iowa Iowa City Iowa USA Institute Rudjer Boskovic Zagreb Croatia Universidad Iberoamericana Mexico City Mexico Instituto de Física de Cantabria (IFCA) CSIC-Universidad de Cantabria Santander Spain Department of Physics Istanbul University Istanbul Türkiye Imperial College London United Kingdom Baylor University Waco Texas USA Lappeenranta-Lahti University of Technology Lappeenranta Finland Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile INFN Sezione di Genova Genova Italy Università di Genova Genova Italy Centro de Investigacion y de Estudios Avanzados del IPN Mexico City Mexico Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania National Centre for Physics Quaid-I-Azam University Islamabad Pakistan Laboratoire Leprince-Ringuet CNRS/IN2P3 Ecole Polytechnique Institut Polytechnique de Paris Palaiseau France University of Canterbury Christchurch New Zealand Riga Technical University Riga Latvia Department of Modern Physics and State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei China INFN Sezione di Padova Padova Italy Università di Padova Padova Italy University of Mississippi Oxford Mississi

The first evidence for the Higgs b.son decay to a Z b.son and a photon is presented, with a statistical significance of 3.4 standard deviations. The result is derived from a comb.ned analysis of the searches performed b. the ATLAS and CMS Collab.rations with proton-proton collision datasets collected at the CERN Large Hadron Collider (LHC) from 2015 to 2018. These correspond to integrated luminosities of around 140 fb.1 for each experiment, at a center-of-mass energy of 13 TeV. The measured signal yield is 2.2±0.7 times the standard model prediction, and agrees with the theoretical expectation within 1.9 standard deviations.

关键词： Rare decays Higgs b.sons W & Z b.sons Hadron colliders

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