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arXiv 2025年

作者： Aaij, R. Abdelmotteleb, A.s.W. Beteta, C. Abellan Abudinén, F. Ackernley, t. Adefisoye, A.A. Adeva, B. Adinolfi, M. Adlarson, P. Agapopoulou, C. Aidala, C.A. Ajaltouni, Z. Akar, s. Akiba, K. Albicocco, P. Albrecht, J. Alessio, F. Alexander, M. Aliouche, Z. Cartelle, P. Alvarez Amalric, R. Amato, s. Amey, J.L. Amhis, Y. An, L. Anderlini, L. Andersson, M. Andreianov, A. Andreola, P. Andreotti, M. Andreou, D. Anelli, A. Ao, D. Archilli, F. Argenton, M. Cuendis, s. Arguedas Artamonov, A. Artuso, M. Aslanides, E. Da silva, R. Ataíde Atzeni, M. Audurier, B. Bacher, D. Perea, i. Bachiller Bachmann, s. Bachmayer, M. Back, J.J. Rodriguez, P. Baladron Balagura, V. Balboni, A. Baldini, W. Balzani, L. Bao, H. de souza Leite, J. Baptista Pretel, C. Barbero Barbetti, M. Barbosa, i.R. Barlow, R.J. Barnyakov, M. Barsuk, s. Barter, W. Bartz, J. Basels, J.M. Bashir, s. Bassi, G. Batsukh, B. Battista, P.B. Bay, A. Beck, A. Becker, M. Bedeschi, F. Bediaga, i.B. Behling, N.A. Belin, s. Belous, K. Belov, i. Belyaev, i. Benane, G. Bencivenni, G. Ben-Haim, E. Berezhnoy, A. Bernet, R. Andres, s. Bernet Bertolin, A. Betancourt, C. Betti, F. Bex, J. Bezshyiko, ia. Bhom, J. Bieker, M.s. Biesuz, N.V. Billoir, P. Biolchini, A. Birch, M. Bishop, F.C.R. Bitadze, A. Blake, t. Blanc, F. Blank, J.E. Blusk, s. Bocharnikov, V. Boelhauve, J.A. Garcia, O. Boente Boettcher, t. Bohare, A. Boldyrev, A. Bolognani, C.s. Bolzonella, R. Bonacci, R.B. Bondar, N. Bordelius, A. Borgato, F. Borghi, s. Borsato, M. Borsuk, J.t. Bottalico, E. Bouchiba, s.A. Bovill, M. Bowcock, t.J.V. Boyer, A. Bozzi, C. Brandenburg, J.D. Rodriguez, A. Brea Breer, N. Brodzicka, J. Gonzalo, A. Brossa Brown, J. Brundu, D. Buchanan, E. Buonincontri, L. Marcos, M. Burgos Burke, A.t. Burr, C. Butter, J.s. Buytaert, J. Byczynski, W. Cadeddu, s. Cai, H. Caillet, A.C. Calabrese, R. Ramirez, s. Calderon Calefice, L. Cali, s. Calvi, M. Gomez, M. Calvo Magalhaes, P. Camargo Bouzas, J.i. Cambon Campana, P. Perez, D.H. Campora Quezada, A.F. Campoverde Capelli, s. School of Physics and Astronomy Monash University Melbourne Australia Rio de Janeiro Brazil Rio de Janeiro Brazil Department of Engineering Physics Tsinghua University Beijing China Beijing China School of Physics State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China University of Chinese Academy of Sciences Beijing China Institute of Particle Physics Central China Normal University Hubei Wuhan China San Jose Costa Rica Université Savoie Mont Blanc CNRS IN2P3-LAPP Annecy France Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France IRFU Gif-Sur-Yvette Saclay France Aix Marseille Univ CNRS/IN2P3 CPPM Marseille France Université Paris-Saclay CNRS/IN2P3 IJCLab Orsay France Laboratoire Leprince-Ringuet CNRS/IN2P3 Ecole Polytechnique Institut Polytechnique de Paris Palaiseau France LPNHE Sorbonne Université Paris Diderot Sorbonne Paris Cité CNRS/IN2P3 Paris France I. Physikalisches Institut RWTH Aachen University Aachen Germany Universität Bonn - Helmholtz-Institut für Strahlen und Kernphysik Bonn Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Physikalisches Institut Albert-Ludwigs-Universität Freiburg Freiburg Germany Heidelberg Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany School of Physics University College Dublin Dublin Ireland INFN Sezione di Bari Bari Italy INFN Sezione di Bologna Bologna Italy INFN Sezione di Ferrara Ferrara Italy INFN Sezione di Firenze Firenze Italy INFN Laboratori Nazionali di Frascati Frascati Italy INFN Sezione di Genova Genova Italy INFN Sezione di Milano Milano Italy INFN Sezione di Milano-Bicocca Milano Italy INFN Sezione di Cagliari Monserrato Italy INFN Sezione di Padova Padova Italy INFN Sezione di Perugia Perugia Italy INFN Sezione di Pisa Pisa Italy INFN Sezione di Roma La Sapienza Roma Italy INFN Sezione di Roma Tor Vergata Roma Italy Nikhef National Institute f

A study is presented of B+ → Ks0K−π+K+ and B+ → Ks0K+π−K+ decays based on the analysis of proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 teV, corresponding to an integrated luminosity of 9 fb−1. the Ks0Kπ invariant-mass distributions of both B+ decay modes show, in the m(Ks0Kπ) PC = 0−+, 1++ and 1+− resonances is observed, dominated by η(1405), η(1470), η(1760), f1(1285), f1(1420) and h1(1405) resonances. the Ks0Kπ Dalitz plots are dominated by asymmetric crossing K∗K bands which are different for the two B+ decay modes. this is due to a different interference pattern between the 1++ and 1+− amplitudes in the two channels. Branching fractions are measured for each resonant contribution. © 2025, CC BY.

关键词： Bosons

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Discovery of two warm mini-Neptunes with contrasting densities orbiting the young K3V star tOi-815*

arXiv

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arXiv 2024年

作者： Psaridi, Angelica Osborn, Hugh Bouchy, François Lendl, Monika Parc, Léna Billot, Nicolas Broeg, Christopher sousa, sérgio G. Adibekyan, Vardan Attia, Omar Bonfanti, Andrea Chakraborty, Hritam Collins, Karen A. Davoult, Jeanne Delgado-Mena, Elisa Grieves, Nolan Guillot, tristan Heitzmann, Alexis Helled, Ravit Hellier, Coel Jenkins, Jon M. Knierim, Henrik Krenn, Andreas Lissauer, Jack J. Luque, Rafael Rapetti, David santos, Nuno C. suárez, Olga Venturini, Julia Wilkin, Francis P. Wilson, thomas G. Winn, Joshua N. Ziegler, Carl Zingales, tiziano Alibert, Yann Brandeker, Alexis Egger, Jo Ann Gandolfi, Davide Hooton, Matthew J. tuson, Amy Ulmer-Moll, solène Abe, Lyu Allart, Romain Alonso, Roi Anderson, David R. Anglada, Guillem Bárczy, tamas Barrado, David Barros, susana C.C. Baumjohann, Wolfgang Beck, Mathias Beck, thomas Benz, Willy Bonfils, Xavier Borsato, Luca Bourrier, Vincent Ciardi, David R. Cameron, Andrew Collier Charnoz, sébastien Cointepas, Marion Csizmadia, szilárd Cubillos, Patricio Curto, Gaspare Lo Davies, Melvyn B. Daylan, tansu Deleuil, Magali Deline, Adrien Delrez, Laetitia Demangeon, Olivier D.s. Demory, Brice-Olivier Dorn, Caroline Dumusque, Xavier Ehrenreich, David Erikson, Anders des Etangs, Alain Lecavelier de Miguel Ferreras, Elena Diana Fortier, Andrea Fossati, Luca Frensch, Yolanda G.C. Fridlund, Malcolm Gillon, Michaël Güdel, Manuel Günther, Maximilian N. Hagelberg, Janis Helling, Christiane Hoyer, sergio isaak, Kate G. Kiss, Laszlo L. Lam, Kristine Laskar, Jacques Lavie, Baptiste Lovis, Christophe Magrin, Demetrio Marafatto, Luca Maxted, Pierre McDermott, scott Mékarnia, Djamel Mordasini, Christoph Murgas, Felipe Nascimbeni, Valerio Nielsen, Louise D. Olofsson, Göran Ottensamer, Roland Pagano, isabella Pallé, Enric Peter, Gisbert Piotto, Giampaolo Pollacco, Don Queloz, Didier Ragazzoni, Roberto Ramos, Devin Rando, Nicola Rauer, Heike Reimers, Christian Ribas, ignasi seager, sara ségransan, Damien scandariato, Gaetano simon, Attila smith, Alexis M.s. stalport, Manu steller, Manfred szabó, Gy Observatoire de Genève Université de Genève Chemin Pegasi 51 Versoix1290 Switzerland Center for Space and Habitability University of Bern Gesellschaftsstrasse 6 Bern3012 Switzerland Department of Physics Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology CambridgeMA02139 United States Weltraumforschung und Planetologie Physikalisches Institut University of Bern Gesellschaftsstrasse 6 Bern3012 Switzerland Instituto de Astrofísica e Ciências do Espaço Universidade do Porto CAUP Rua das Estrelas Porto4150-762 Portugal Departamento de Física e Astronomia Faculdade de Ciências Universidade do Porto Rua do Campo Alegre Porto4169-007 Portugal Space Research Institute Austrian Academy of Sciences Schmiedlstraße 6 Graz8042 Austria Center for Astrophysics Harvard & Smithsonian 60 Garden Street CambridgeMA02138 United States Université Côte d’Azur Observatoire de la Côte d’Azur CNRS Laboratoire Lagrange Bd de l’Observatoire CS 34229 Nice06304 Cedex 4 France Institute for Computational Science University of Zurich Winterthurerstr. 90 Zurich8057 Switzerland Astrophysics Group Keele University StaffordshireST5 5BG United Kingdom Department of Astronomy & Astrophysics University of Chicago ChicagoIL60637 United States NASA Ames Research Center Moffett FieldCA94035 United States Research Institute for Advanced Computer Science Universities Space Research Association WashingtonDC20024 United States Department of Physics and Astronomy Union College 807 Union St. SchenectadyNY12308 United States Department of Physics University of Warwick Gibbet Hill Road CoventryCV4 7AL United Kingdom Department of Astrophysical Sciences Princeton University PrincetonNJ08544 United States Department of Physics Engineering and Astronomy Stephen F. Austin State University 1936 North St NacogdochesTX75962 United States Dipartimento di Fisica e Astronomia ""Galileo Galilei"" Università degli Studi di Padova Vicol

We present the discovery and characterization of two warm mini-Neptunes transiting the K3V star tOi-815 in a K-M binary system. Analysis of its spectra and rotation period reveal the star to be young, with an age of 200+400−200 Myr. tOi-815b has a 11.2-day period and a radius of 2.94 ± 0.05 R with transits observed by tEss, CHEOPs, AstEP, and LCOGt. the outer planet, tOi-815c, has a radius of 2.62 ± 0.10 R, based on observations of three nonconsecutive transits with tEss;targeted CHEOPs photometry and radial velocity follow-up with EsPREssO were required to confirm the 35-day period. EsPREssO confirmed the planetary nature of both planets and measured masses of 7.6 ± 1.5 M (ρP = 1.64+0.33−0.31 g cm−3) and 23.5 ± 2.4 M (ρP = 7.2+1.1−1.0 g cm−3), respectively. thus, the planets have very different masses, which is unusual for compact multi-planet systems. Moreover, our statistical analysis of mini-Neptunes orbiting FGK stars suggests that weakly irradiated planets tend to have higher bulk densities compared to those undergoing strong irradiation. this could be ascribed to their cooler atmospheres, which are more compressed and denser. internal structure modeling of tOi-815b suggests it likely has a H-He atmosphere that constitutes a few percent of the total planet mass, or higher if the planet is assumed to have no water. in contrast, the measured mass and radius of tOi-815c can be explained without invoking any atmosphere, challenging planetary formation theories. Finally, we infer from our measurements that the star is viewed close to pole-on, which implies a spin-orbit misalignment at the 3σ level. this emphasizes the peculiarity of the system’s orbital architecture, and probably hints at an eventful dynamical history. © 2024, CC BY.

关键词： Photometry

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search for a vector-like quark t′ → tH via the diphoton decay mode of the Higgs boson in proton-proton collisions at √s = 13 teV

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Journal of High Energy Physics 2023年第9期2023卷 1-40页

作者： tumasyan, A. Adam, W. Andrejkovic, J.W. Bergauer, t. Chatterjee, s. Damanakis, K. Dragicevic, M. Escalante Del Valle, A. Hussain, P.s. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, i. Paulitsch, P. Pitters, F.M. schieck, J. schöfbeck, R. schwarz, D. sonawane, M. templ, s. Waltenberger, W. Wulz, C.-E. Darwish, M.R. Janssen, t. Kello, t. Rejeb sfar, H. Van Mechelen, P. Bols, E.s. D’Hondt, J. De Moor, A. Delcourt, M. El Faham, H. Lowette, s. Moortgat, s. Morton, A. Müller, D. sahasransu, A.R. tavernier, s. Van Doninck, W. Vannerom, D. Clerbaux, B. De Lentdecker, G. Favart, L. Hohov, D. Jaramillo, J. Lee, K. Mahdavikhorrami, M. Makarenko, i. Malara, A. Paredes, s. Pétré, L. Postiau, N. thomas, L. Vanden Bemden, M. Vander Velde, C. Vanlaer, P. Dobur, D. Knolle, J. Lambrecht, L. Mestdach, G. Rendón, C. samalan, A. skovpen, K. tytgat, M. Van Den Bossche, N. Vermassen, B. Wezenbeek, L. Benecke, A. Bruno, G. Bury, F. Caputo, C. David, P. Delaere, C. Donertas, i.s. Giammanco, A. Jaffel, K. Jain, sa. Lemaitre, V. Mondal, K. taliercio, A. tran, t.t. Vischia, P. Wertz, s. Alves, G.A. Coelho, E. Hensel, C. Moraes, A. Rebello teles, P. Aldá Júnior, W.L. Alves Gallo Pereira, M. Barroso Ferreira Filho, M. Brandao Malbouisson, H. Carvalho, W. Chinellato, J. Da Costa, E.M. Da silveira, G.G. De Jesus Damiao, D. Dos santos sousa, V. Fonseca De souza, s. Martins, J. Mora Herrera, C. Mota Amarilo, K. Mundim, L. Nogima, H. santoro, A. silva Do Amaral, s.M. sznajder, A. thiel, M. Vilela Pereira, A. Bernardes, C.A. Calligaris, L. Fernandez Perez tomei, t.R. Gregores, E.M. Mercadante, P.G. Novaes, s.F. Padula, sandra s. Aleksandrov, A. Antchev, G. Hadjiiska, R. iaydjiev, P. Misheva, M. Rodozov, M. shopova, M. sultanov, G. Dimitrov, A. ivanov, t. Litov, L. Pavlov, B. Petkov, P. Petrov, A. shumka, E. thakur, s. Cheng, t. Javaid, t. Mittal, M. Yuan, L. Ahmad, M. Bauer, G. Hu, Z. Lezki, s. Yi, K. Chen, G.M. Chen, H.s. Chen, M. iemmi, F. Jiang, C.H. Kapoor, A. Liao, H. Liu, Z.-A. Milosevic, V. Monti, F. sharma, R. tao, J. thomas-Wilsker 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 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 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 Zhejiang University Zhejiang Hangzhou 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 Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics

A search for the electroweak production of a vector-like quark t′, decaying to a top quark and a Higgs boson is presented. the search is based on a sample of proton-proton collision events recorded at the LHC at s = 13 teV, corresponding to an integrated luminosity of 138 fb1sup>. this is the first t′ search that exploits the Higgs boson decay to a pair of photons. For narrow isospin singlet t′ states with masses up to 1.1 teV, the excellent diphoton invariant mass resolution of 1–2% results in an increased sensitivity compared to previous searches based on the same production mechanism. the electroweak production of a t′ quark with mass up to 960 GeV is excluded at 95% confidence level, assuming a coupling strength κtsub> = 0.25 and a relative decay width Γ/Mt′sub> < 5%. [Figure not available: see fulltext.]. © 2023, the Author(s).

关键词： Beyond standard Model Hadron-Hadron scattering top Physics

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Bottom quark energy loss and hadronization with B+ and nuclear modification factors using pp and PbPb collisions at = 5.02 teV

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Journal of High Energy Physics 2025年第2期2025卷 1-40页

作者： Hayrapetyan, A. tumasyan, A. Adam, W. Andrejkovic, J. W. Bergauer, t. Chatterjee, s. Damanakis, K. Dragicevic, M. Hussain, P. s. Jeitler, M. Krammer, N. Li, A. Liko, D. Mikulec, i. schieck, J. schöfbeck, R. schwarz, D. sonawane, M. templ, s. Waltenberger, W. Wulz, C.-E. Darwish, M. R. Janssen, t. Van Mechelen, P. Breugelmans, N. D’Hondt, J. Dansana, s. De Moor, A. Delcourt, M. Heyen, F. Lowette, s. Makarenko, i. Müller, D. tavernier, s. tytgat, M. Van Onsem, G. P. Van Putte, s. Vannerom, D. Bilin, B. Clerbaux, B. Das, A. K. De Lentdecker, G. Evard, H. Favart, L. Gianneios, P. Jaramillo, J. Khalilzadeh, A. Khan, F. A. Lee, K. Mahdavikhorrami, M. Malara, A. Paredes, s. shahzad, M. A. thomas, L. Vanden Bemden, M. Vander Velde, C. Vanlaer, P. De Coen, M. Dobur, D. Gokbulut, G. Hong, Y. Knolle, J. Lambrecht, L. Marckx, D. Mota Amarilo, K. samalan, A. skovpen, K. Van Den Bossche, N. van der Linden, J. Wezenbeek, L. Benecke, A. Bethani, A. Bruno, G. Caputo, C. De Favereau De Jeneret, J. Delaere, C. Donertas, i. s. Giammanco, A. Guzel, A. O. Jain, sa. Lemaitre, V. Lidrych, J. Mastrapasqua, P. tran, t. t. Wertz, s. Alves, G. A. Alves Gallo Pereira, M. Coelho, E. Correia silva, G. Hensel, C. Menezes De Oliveira, t. Moraes, A. Rebello teles, P. soeiro, M. Vilela Pereira, A. Aldá Júnior, W. L. Barroso Ferreira Filho, M. Brandao Malbouisson, H. Carvalho, W. Chinellato, J. Da Costa, E. M. Da silveira, G. G. De Jesus Damiao, D. Fonseca De souza, s. Gomes De souza, R. Macedo, M. Martins, J. Mora Herrera, C. Mundim, L. Nogima, H. Pinheiro, J. P. santoro, A. sznajder, A. thiel, M. Bernardes, C. A. Calligaris, L. Fernandez Perez tomei, t. R. Gregores, E. M. Maietto silverio, i. Mercadante, P. G. Novaes, s. F. Orzari, B. Padula, sandra s. 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. thakur, s. Cheng, t. Javaid, t. Yuan, L. Hu, Z. Liang, Z. Liu, J. Yi, K. Chen, G. M. Chen, H. s. Chen, M. iemmi, F. Jiang, C. H. Yerevan Physics Institute Yerevan Armenia Yerevan State University Yerevan Armenia Institut für Hochenergiephysik Vienna Austria TU Wien Vienna Austria Universiteit Antwerpen Antwerpen Belgium Institute of Basic and Applied Sciences Faculty of Engineering Arab Academy for Science Technology and Maritime Transport Alexandria Egypt Vrije Universiteit Brussel Brussel Belgium Ghent University Ghent Belgium Université Libre de Bruxelles Bruxelles 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 de Campinas Campinas Brazil Federal University of Rio Grande do Sul Porto Alegre Brazil UFMS Nova Andradina 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 Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Nanjing Normal University Nanjing China The University of Iowa Iowa City USA Institute of High Energy Physics Beijing China University of Chinese Academy of Sciences Beijing China China Center of Advanced Science and Technology Beijing China China Spallation Neutron Source Guangdong China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Guangdong Provincial Key Laboratory of Nuclear Science and Guangdong-Hong Kong Joint Laboratory of Quantum Matter South China Normal University Guangzhou China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Henan Normal University Xinxiang China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) - Fudan University Shanghai China Zhejiang University Hangzhou Ch

the production cross sections of $$ {\textrm{B}}_{\textrm{s}}^0 $$ and B+ mesons are reported in proton-proton (pp) collisions recorded by the CMS experiment at the CERN LHC with a center-of-mass energy of 5.02 teV. the data sample corresponds to an integrated luminosity of 302 pb−1. the cross sections are based on measurements of the $$ {\textrm{B}}_{\textrm{s}}^0 $$ → J/ψ(μ+μ−)ϕ(1020)(K+K−) and B+ → J/ψ(μ+μ−)K+ decay channels. Results are presented in the transverse momentum (pt) range 7–50 GeV/c and the rapidity interval |y| < 2.4 for the B mesons. the measured pt-differential cross sections of B+ and $$ {\textrm{B}}_{\textrm{s}}^0 $$ in pp collisions are well described by fixed-order plus next-to-leading logarithm perturbative quantum chromodynamics calculations. Using previous PbPb collision measurements at the same nucleon-nucleon center-of-mass energy, the nuclear modification factors, RAA, of the B mesons are determined. For pt > 10 GeV/c, both mesons are found to be suppressed in PbPb collisions (with RAA values significantly below unity), with less suppression observed for the $$ {\textrm{B}}_{\textrm{s}}^0 $$ mesons. in this pt range, the RAA values for the B+ mesons are consistent with those for inclusive charged hadrons and D0 mesons. Below 10 GeV/c, both B+ and $$ {\textrm{B}}_{\textrm{s}}^0 $$ are found to be less suppressed than either inclusive charged hadrons or D0 mesons, with the $$ {\textrm{B}}_{\textrm{s}}^0 $$ RAA value consistent with unity. the RAA values found for the B+ and $$ {\textrm{B}}_{\textrm{s}}^0 $$ are compared to theoretical calculations, providing constraints on the mechanism of bottom quark energy loss and hadronization in the quark-gluon plasma, the hot and dense matter created in ultrarelativistic heavy ion collisions.

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First measurement of the top quark pair production cross section in proton-proton collisions at s = 13.6 teV

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Journal of High Energy Physics 2023年第8期2023卷 204页

作者： tumasyan, A. Adam, W. Andrejkovic, J.W. Bergauer, t. Chatterjee, s. Damanakis, K. Dragicevic, M. Escalante Del Valle, A. Hussain, P.s. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, i. schieck, J. schöfbeck, R. schwarz, D. sonawane, M. templ, s. Waltenberger, W. Wulz, C.-E. Darwish, M.R. Janssen, t. Kello, t. Van Mechelen, P. Bols, E.s. D’Hondt, J. De Moor, A. Delcourt, M. El Faham, H. Lowette, s. Morton, A. Müller, D. sahasransu, A.R. tavernier, s. Van Doninck, W. Van Putte, s. Vannerom, D. Clerbaux, B. Dansana, s. De Lentdecker, G. Favart, L. Hohov, D. Jaramillo, J. Lee, K. Mahdavikhorrami, M. Makarenko, i. Malara, A. Paredes, s. Pétré, L. Postiau, N. thomas, L. Vanden Bemden, M. Vander Velde, C. Vanlaer, P. Dobur, D. Knolle, J. Lambrecht, L. Mestdach, G. Rendón, C. samalan, A. skovpen, K. tytgat, M. Van Den Bossche, N. Vermassen, B. Wezenbeek, L. Benecke, A. Bruno, G. Bury, F. Caputo, C. David, P. Delaere, C. Donertas, i.s. Giammanco, A. Jaffel, K. Jain, sa. Lemaitre, V. Lidrych, J. Mondal, K. tran, t.t. Vischia, P. Wertz, s. Alves, G.A. Coelho, E. Hensel, C. Moraes, A. Rebello teles, P. Aldá Júnior, W.L. Alves Gallo Pereira, M. Barroso Ferreira Filho, M. Brandao Malbouisson, H. Carvalho, W. Chinellato, J. Da Costa, E.M. Da silveira, G.G. De Jesus Damiao, D. Dos santos sousa, V. Fonseca De souza, s. Martins, J. Mora Herrera, C. Mota Amarilo, K. Mundim, L. Nogima, H. santoro, A. silva Do Amaral, s.M. sznajder, A. thiel, M. Vilela Pereira, A. Bernardes, C.A. Calligaris, L. Fernandez Perez tomei, t.R. Gregores, E.M. Mercadante, P.G. Novaes, s.F. Orzari, B. Padula, sandra s. Aleksandrov, A. Antchev, G. Hadjiiska, R. iaydjiev, P. Misheva, M. Rodozov, M. shopova, M. sultanov, G. Dimitrov, A. ivanov, t. Litov, L. Pavlov, B. Petkov, P. Petrov, A. shumka, E. Keshri, s. thakur, s. Cheng, t. Guo, Q. Javaid, t. Mittal, M. Yuan, L. Bauer, G. Hu, Z. Lezki, s. Yi, K. Chen, G.M. Chen, H.s. Chen, M. iemmi, F. Jiang, C.H. Kapoor, A. Liao, H. Liu, Z.-A. Milosevic, V. Monti, F. sharma, R. tao, J. Wang, J. Zhang, H. Zhao, J 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 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 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 Zhejiang University Zhejiang Hangzhou 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 Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics

the first measurement of the top quark pair (tt¯) production cross section in proton-proton collisions at s = 13.6 teV is presented. Data recorded with the CMs detector at the CERN LHC in summer 2022, corresponding to an integrated luminosity of 1.21 fb−1sup>, are analyzed. Events are selected with one or two charged leptons (electrons or muons) and additional jets. A maximum likelihood fit is performed in event categories defined by the number and flavors of the leptons, the number of jets, and the number of jets identified as originating from b quarks. An inclusive tt¯ production cross section of 881 ± 23 (stat + syst) ± 20 (lumi) pb is measured, in agreement with the standard model prediction of 924−40sub>+32sup> pb. © the Author(s) 2023.

关键词： Hadron-Hadron scattering top Physics

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search for new physics in the τ lepton plus missing transverse momentum final state in proton-proton collisions at √s = 13 teV

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Journal of High Energy Physics 2023年第9期2023卷 51页

A search for physics beyond the standard model (sM) in the final state with a hadronically decaying tau lepton and a neutrino is presented. this analysis is based on data recorded by the CMs experiment from proton-proton collisions at a center-of-mass energy of 13 teV at the LHC, corresponding to a total integrated luminosity of 138 fb −1sup>. the transverse mass spectrum is analyzed for the presence of new physics. No significant deviation from the sM prediction is observed. Limits are set on the production cross section of a W′ boson decaying into a tau lepton and a neutrino. Lower limits are set on the mass of the sequential sM-like heavy charged vector boson and the mass of a quantum black hole. Upper limits are placed on the couplings of a new boson to the sM fermions. Constraints are put on a nonuniversal gauge interaction model and an effective field theory model. For the first time, upper limits on the cross section of t-channel leptoquark (LQ) exchange are presented. these limits are translated into exclusion limits on the LQ mass and on its coupling in the t-channel. the sensitivity of this analysis extends into the parameter space of LQ models that attempt to explain the anomalies observed in B meson decays. the limits presented for the various interpretations are the most stringent to date. Additionally, a model-independent limit is provided. [Figure not available: see fulltext.]. © 2023, the Author(s).

关键词： Beyond standard Model Hadron-Hadron scattering tau Physics

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Measurements of the azimuthal anisotropy of prompt and nonprompt charmonia in PbPb collisions at √sNN = 5.02 teV

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Journal of High Energy Physics 2023年第10期2023卷 115页

作者： tumasyan, A. Adam, W. Andrejkovic, J.W. Bergauer, t. Chatterjee, s. Damanakis, K. Dragicevic, M. Escalante Del Valle, A. Hussain, P.s. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, i. Paulitsch, P. Pitters, F.M. schieck, J. schöfbeck, R. schwarz, D. sonawane, M. templ, s. Waltenberger, W. Wulz, C.-E. Darwish, M.R. Janssen, t. Kello, t. Rejeb sfar, H. Van Mechelen, P. Bols, E.s. D’Hondt, J. De Moor, A. Delcourt, M. El Faham, H. Lowette, s. Moortgat, s. Morton, A. Müller, D. sahasransu, A.R. tavernier, s. Van Doninck, W. Vannerom, D. Clerbaux, B. De Lentdecker, G. Favart, L. Hohov, D. Jaramillo, J. Lee, K. Mahdavikhorrami, M. Makarenko, i. Malara, A. Paredes, s. Pétré, L. Postiau, N. thomas, L. Vanden Bemden, M. Vander Velde, C. Vanlaer, P. Dobur, D. Knolle, J. Lambrecht, L. Mestdach, G. Niedziela, M. Rendón, C. Roskas, C. samalan, A. skovpen, K. tytgat, M. Van Den Bossche, N. Vermassen, B. Wezenbeek, L. Benecke, A. Bruno, G. Bury, F. Caputo, C. David, P. Delaere, C. Donertas, i.s. Giammanco, A. Jaffel, K. Jain, sa. Lemaitre, V. Mondal, K. taliercio, A. tran, t.t. Vischia, P. Wertz, s. Alves, G.A. Coelho, E. Hensel, C. Moraes, A. Rebello teles, P. Aldá Júnior, W.L. Alves Gallo Pereira, M. Barroso Ferreira Filho, M. Brandao Malbouisson, H. Carvalho, W. Chinellato, J. Da Costa, E.M. Da silveira, G.G. De Jesus Damiao, D. Dos santos sousa, V. Fonseca De souza, s. Martins, J. Mora Herrera, C. Mota Amarilo, K. Mundim, L. Nogima, H. santoro, A. silva Do Amaral, s.M. sznajder, A. thiel, M. torres Da silva De Araujo, F. Vilela Pereira, A. Bernardes, C.A. Calligaris, L. Fernandez Perez tomei, t.R. Gregores, E.M. Mercadante, P.G. Novaes, s.F. Padula, sandra s. Aleksandrov, A. Antchev, G. Hadjiiska, R. iaydjiev, P. Misheva, M. Rodozov, M. shopova, M. sultanov, G. Dimitrov, A. ivanov, t. Litov, L. Pavlov, B. Petkov, P. Petrov, A. shumka, E. thakur, s. Cheng, t. Javaid, t. Mittal, M. Yuan, L. Ahmad, M. Bauer, G. Hu, Z. Lezki, s. Yi, K. Chen, G.M. Chen, H.s. Chen, M. iemmi, F. Jiang, C.H. Kapoor, A. Kou, H. Liao, H. Liu, 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 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 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 Zhejiang University Zhejiang Hangzhou 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 Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institut

the second-order (v 2) and third-order (v 3) Fourier coefficients describing the azimuthal anisotropy of prompt and nonprompt (from b-hadron decays) J/ψ, as well as prompt ψ(2s) mesons are measured in lead-lead coll... 详细信息

the second-order (v 2sub>) and third-order (v 3sub>) Fourier coefficients describing the azimuthal anisotropy of prompt and nonprompt (from b-hadron decays) J/ψ, as well as prompt ψ(2s) mesons are measured in lead-lead collisions at a center-of-mass energy per nucleon pair of sNN = 5.02 teV. the analysis uses a data set corresponding to an integrated luminosity of 1.61 nb −1sup> recorded with the CMs detector. the J/ψ and ψ(2s) mesons are reconstructed using their dimuon decay channel. the v 2sub> and v 3sub> coefficients are extracted using the scalar product method and studied as functions of meson transverse momentum and collision centrality. the measured v 2sub> values for prompt J/ψ mesons are found to be larger than those for nonprompt J/ψ mesons. the prompt J/ψ v 2sub> values at high p tsub> are found to be underpredicted by a model incorporating only parton energy loss effects in a quark-gluon plasma medium. Prompt and nonprompt J/ψ meson v 3sub> and prompt ψ(2s) v 2sub> and v 3sub> values are also reported for the first time, providing new information about heavy quark interactions in the hot and dense medium created in heavy ion collisions. [Figure not available: see fulltext.] © 2023, the Author(s).

关键词： Charm Physics Collective Flow Heavy ion Experiments Quarkonium

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Multimode -symmetry thresholds and third-order exceptional points in coupled dielectric waveguides with loss and gain

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Journal of Optics 2021年第12期23卷

作者： Anton V Hlushchenko Denis V Novitsky Vitalii i shcherbinin Vladimir R tuz State Key Laboratory of Integrated Optoelectronics College of Electronic Science and Engineering International Center of Future Science Jilin University 2699 Qianjin Street Changchun 130012 People's Republic of China National Science Center 'Kharkiv Institute of Physics and Technology' of National Academy of Sciences of Ukraine 1 Akademicheskaya Street Kharkiv 61108 Ukraine B. I. Stepanov Institute of Physics National Academy of Sciences of Belarus 68 Nezavisimosti Avenue Minsk 220072 Belarus School of Radiophysics Biomedical Electronics and Computer Systems V. N. Karazin Kharkiv National University 4 Svobody Square Kharkiv 61022 Ukraine

A pair of coupled dielectric waveguides with balanced loss and gain is the basic system for observing the phenomena of parity-time () symmetry and exceptional points (EPs). We use the multimode analytical approach to study the peculiarities of interaction between the modes excited in such an archetypal structure. With this approach, the conditions for symmetry breaking are obtained in the special case of the hybrid HE and EH modes resulting in the ordinary second-order EPs (or -symmetry thresholds). the coupling of modes with the different azimuthal indices (the tM01 and HE21 modes in our study) generates the uncommon types of EPs. First, there are the so-called multimode -symmetry thresholds due to interaction of hybrid and transverse modes. second, the third-order EPs appear as a result of three-modes degeneracy of real eigenvalues. it is noteworthy that an increase in the EPs order is achieved without both breaking the symmetry and introducing additional elements into the waveguide structure. the results obtained with the multimode analytical approach are in perfect agreement with the independent full-wave simulations.

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Open Data from the third Observing Run of LiGO, Virgo, KAGRA, and GEO

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Astrophysical Journal, supplement series 2023年第2期267卷 29-29页

作者： Abbott, R. Abe, H. Acernese, F. Ackley, K. Adhicary, s. Adhikari, N. Adhikari, R.X. Adkins, V.K. Adya, V.B. Affeldt, C. Agarwal, D. Agathos, M. Aguiar, O.D. Aiello, L. Ain, A. Ajith, P. Akutsu, t. Albanesi, s. Alfaidi, R.A. Al-Jodah, A. Alléné, C. Allocca, A. Almualla, M. Altin, P.A. Amato, A. Amez-Droz, L. Amorosi, A. Anand, s. Ananyeva, A. Andersen, R. Anderson, s.B. Anderson, W.G. Andia, M. Ando, M. Andrade, t. Andres, N. Andrés-Carcasona, M. Andrić, t. Ansoldi, s. Antelis, J.M. Antier, s. Aoumi, M. Apostolatos, t. Appavuravther, E.Z. Appert, s. Apple, s.K. Arai, K. Araya, A. Araya, M.C. Areeda, J.s. Arène, M. Aritomi, N. Arnaud, N. Arogeti, M. Aronson, s.M. Arun, K.G. Asada, H. Ashton, G. Aso, Y. Assiduo, M. Assis de souza Melo, s. Aston, s.M. Astone, P. Aubin, F. AultONeal, K. Babak, s. Badalyan, A. Badaracco, F. Badger, C. Bae, s. Bagnasco, s. Bai, Y. Baier, J.G. Baiotti, L. Baird, J. Bajpai, R. Baka, t. Ball, M. Ballardin, G. Ballmer, s.W. Baltus, G. Banagiri, s. Banerjee, B. Bankar, D. Baral, P. Barayoga, J.C. Barber, J. Barish, B.C. Barker, D. Barneo, P. Barone, F. Barr, B. Barsotti, L. Barsuglia, M. Barta, D. Barthelmy, s.D. Barton, M.A. Bartos, i. Basak, s. Basalaev, A. Bassiri, R. Basti, A. Bawaj, M. Bayley, J.C. Baylor, A.C. Bazzan, M. Bécsy, B. Bedakihale, V.M. Beirnaert, F. Bejger, M. Bell, A.s. Benedetto, V. Beniwal, D. Benoit, W. Bentley, J.D. Ben Yaala, M. Bera, s. Berbel, M. Bergamin, F. Berger, B.K. Bernuzzi, s. Beroiz, M. Berry, C.P.L. Bersanetti, D. Bertolini, A. Betzwieser, J. Beveridge, D. Bevins, N. Bhandare, R. Bhandari, A.V. Bhardwaj, U. Bhatt, R. Bhattacharjee, D. Bhaumik, s. Bianchi, A. Bilenko, i.A. Bilicki, M. Billingsley, G. Bini, s. Birnholtz, O. Biscans, s. Bischi, M. Biscoveanu, s. Bisht, A. Biswas, B. Bitossi, M. Bizouard, M.-A. Blackburn, J.K. Blair, C.D. Blair, D.G. Blair, R.M. Bobba, F. Bode, N. Boër, M. Bogaert, G. Boileau, G. Boldrini, M. Bolingbroke, G.N. Bonavena, L.D. Bondarescu, R. Bondu, F. Bonilla, E. Bonilla, G.s. Bonnand, R. Booker, P. Bork, R. Boschi, V. Bose, N. LIGO Laboratory California Institute of Technology Pasadena 91125 CA United States Graduate School of Science Tokyo Institute of Technology 2-12-1 Ookayama Meguro-ku Tokyo 152-8551 Japan Dipartimento di Farmacia Università di Salerno Salerno Fisciano I-84084 Italy INFN Sezione di Napoli Napoli I-80126 Italy OzGrav School of Physics & Astronomy Monash University Clayton 3800 VIC Australia The Pennsylvania State University University Park 16802 PA United States University of Wisconsin-Milwaukee Milwaukee 53201 WI United States Louisiana State University Baton Rouge 70803 LA United States OzGrav Australian National University Canberra 0200 ACT Australia Max Planck Institute for Gravitational Physics (Albert Einstein Institute) Hannover D-30167 Germany Leibniz Universität Hannover Hannover D-30167 Germany Inter-University Centre for Astronomy and Astrophysics Pune 411007 India University of Cambridge Cambridge CB2 1TN United Kingdom Instituto Nacional de Pesquisas Espaciais São Paulo São José dos Campos 12227-010 Brazil Cardiff University Cardiff CF24 3AA United Kingdom INFN Sezione di Pisa Pisa I-56127 Italy International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India Gravitational Wave Science Project National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan Dipartimento di Fisica Università degli Studi di Torino Torino I-10125 Italy INFN Sezione di Torino Torino I-10125 Italy SUPA University of Glasgow Glasgow G12 8QQ United Kingdom OzGrav University of Western Australia Crawley 6009 WA Australia Univ. Savoie Mont Blanc CNRS Laboratoire d'Annecy de Physique des Particules - IN2P3 Annecy F-74000 France Università di Napoli “Federico II” Napoli I-80126 Italy University of Minnesota Minneapolis 55455 MN United States M

the global network of gravitational-wave observatories now includes five detectors, namely LiGO Hanford, LiGO Livingston, Virgo, KAGRA, and GEO 600. these detectors collected data during their third observing run, O3, composed of three phases: O3a starting in 2019 April and lasting six months, O3b starting in 2019 November and lasting five months, and O3GK starting in 2020 April and lasting two weeks. in this paper we describe these data and various other science products that can be freely accessed through the Gravitational Wave Open science Center at https://***. the main data set, consisting of the gravitational-wave strain time series that contains the astrophysical signals, is released together with supporting data useful for their analysis and documentation, tutorials, as well as analysis software packages. © 2023. the Author(s). Published by the American Astronomical society.

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Evidence for the Higgs Boson Decay to a Z Boson 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. Abbott K. Abeling N. J. Abicht s. H. Abidi A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti B. s. Acharya C. Adam Bourdarios 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. Aitbenchikh i. Aizenberg M. Akbiyik t. P. A. Åkesson A. V. Akimov D. Akiyama N. N. Akolkar K. Al Khoury G. L. Alberghi J. Albert P. Albicocco G. L. Albouy 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. Alibocus M. Aliev G. Alimonti W. Alkakhi C. Allaire B. M. M. Allbrooke 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. Ambler 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 Bella C. Appelt A. Apyan N. Aranzabal 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. Asbah 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. Axi.t.s G. Azuelos D. Babal H. Bachacou K. Bachas A. Bachiu F. Backman A. Badea P. Bagnaia M. Bahmani A. J. Bailey V. R. Bailey J. t. Baines L. Baines C. Bakalis O. K. Baker E. Bakos D. Bakshi Gupta V. Balakrishnan R. Balasubramanian E. M. Baldin P. Balek E. Ballabene F. Balli L. M. Baltes W. K. Balunas J. Balz E. Banas M. Bandieramonte A. Bandyopadhyay s. Bansal L. Barak M. Barakat E. L. Barberio D. Barberis M. Barbero M. Z. Barel K. N. Barends t. Ba 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 boson decay to a Z boson and a photon is presented, with a statistical significance of 3.4 standard deviations. the result is derived from a combined analysis of the searches performed by the AtLAs and CMs Collaborations 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 bosons W & Z bosons Hadron colliders

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