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arXiv 2025年

作者： Acerb., F. Adhikari, P. Agnes, P. Ahmad, I. Alb.rgo, S. Alb.querque, I.F. Alexander, T. Alton, A.K. Amaudruz, P. Angiolilli, M. Aprile, E. AtzoriCorona, M. Auty, D.J. Ave, M. Avetisov, I.C. Azzolini, O. b.ck, H.O. b.lmforth, Z. b.rrado Olmedo, A. b.rrillon, P. b.tignani, G. b.owmick, P. b.oem, M. b.ua, S. b.cci, V. b.nivento, W. b.ttino, b. b.ulay, M.G. b.chowicz, A. b.ssino, S. b.sto, J. Cadeddu, M. Cadoni, M. Calab.ese, R. Camillo, V. Caminata, A. Canci, N. Caravati, M. Cárdenas-Montes, M. Cargioli, N. Carlini, M. Castellani, A. Castello, P. Cavalcante, P. Ceb.ian, S. Chashin, S. Chepurnov, A. Choudhary, S. Cifarelli, L. Cleveland, b. Coadou, Y. Cocco, V. Colaiuda, D. CondeVilda, E. Consiglio, L. Corb.tt, J. Costa, b.S. Czub.k, M. D’Aniello, M. D’Auria, S. Da Rocha Rolo, M.D. Dainty, A. Darb., G. Davini, S. deAsmundis, R. De Cecco, S. Dellacasa, G. Derb.n, A.V. Devoto, A. DiCapua, F. Di Noto, L. Di Stefano, P. Dias, L.K. Díaz Mairena, D. Dionisi, C. Dolganov, G. Dordei, F. Dronik, V. Dylon, F. Elersich, A. Ellingwood, E. Erjavec, T. Fearon, N. Fernandez Diaz, M. Ficorella, A. Fiorillo, G. Franchini, P. Franco, D. Frandini Gatti, H. Frolov, E. Gab.iele, F. Gahan, D. Galb.ati, C. Galiński, G. Gallina, G. Gallus, G. Garb.ni, M. Garcia Ab.a, P. Gawdzik, A. Gendotti, A. Giovanetti, G.K. Goicoechea Casanueva, V. Gola, A. Grandi, L. Grauso, G. Grilli di Cortona, G. Grob.v, A. Gromov, M. Gulino, M. Hackett, b.R. Hallin, A.L. Hamer, A. Haranczyk, M. Harrop, b. Hessel, T. Hollingham, J. Horikawa, S. Hu, J. Hub.ut, F. Huff, D. Hugues, T. Hungerford, E.V. Ianni, A. Ippolito, V. Jamil, A. Jillings, C. Keloth, R. Kemmerich, N. Kemp, A. Kimura, M. Klenin, A. Kondo, K. Korga, G. Kotsiopoulou, L. Koulosousas, S. Kub.nkin, A. Kunzé, P. Kuss, M. Kuźniak, M. Kuzwa, M. La Commara, M. Lai, M. Le Guirriec, E. Leason, E. Leoni, A. Lidey, L. Lipp, J. Lissia, M. Luzzi, L. Lychagina, O. Macfadyen, O. Machulin, I.N. Manecki, S. Fondazione Bruno Kessler Povo38123 Italy Department of Physics Carleton University OttawaONK1S 5B6 Canada Gran Sasso Science Institute L’Aquila67100 Italy Assergi67100 Italy AstroCeNT Nicolaus Copernicus Astronomical Center the Polish Academy of Sciences Warsaw00-614 Poland Università of Catania Catania95124 Italy INFN Catania Catania95121 Italy Instituto de Física Universidade de São Paulo São Paulo05508-090 Brazil Pacific Northwest National Laboratory RichlandWA99352 United States Physics Department Augustana University Sioux FallsSD57197 United States TRIUMF 4004 Wesbrook Mall VancouverBCV6T 2A3 Canada Physics Department Columbia University New YorkNY10027 United States INFN Cagliari Cagliari09042 Italy Physics Department Università degli Studi di Cagliari Cagliari09042 Italy Department of Physics University of Alberta EdmontonABT6G 2R3 Canada Mendeleev University of Chemical Technology Moscow125047 Russia INFN Laboratori Nazionali di Legnaro Legnaro Padova35020 Italy Institute of Experimental Physics University of Hamburg Hamburg22761 Germany CIEMAT Centro de Investigaciones Energéticas Medioambientales y Tecnológicas Madrid28040 Spain Centre de Physique des Particules de Marseille Aix Marseille Univ CNRS IN2P3 CPPM Marseille France Physics Department Università degli Studi di Pisa Pisa56127 Italy INFN Pisa Pisa56127 Italy University of Oxford OxfordOX1 2JD United Kingdom Rutherford Appleton Laboratory Particle Physics Department Harwell Oxford DidcotOX11 0QX United Kingdom INFN Torino Torino10125 Italy Department of Electronics and Telecommunications Politecnico di Torino Torino10129 Italy INFN Sezione di Roma Roma00185 Italy Physics Department Università degli Studi di Genova Genova16146 Italy INFN Genova Genova16146 Italy Institute of Radioelectronics and Multimedia Technology Faculty of Electronics and Information Technology Warsaw University of Technology Warsaw00-661 Poland INFN Roma

The DarkSide-20k dark matter experiment, currently under construction at LNGS, features a dual-phase time projection chamb.r (TPC) with a ∼50 t argon target from an underground well. At this scale, it is crucial to optimise the argon flow pattern for efficient target purification and for fast distrib.tion of internal gaseous calib.ation sources with lifetimes of the order of hours. To this end, we have performed computational fluid dynamics simulations and heat transfer calculations. The residence time distrib.tion shows that the detector is well-mixed on time-scales of the turnover time (∼40 d). Notab.y, simulations show that despite a two-order-of-magnitude difference b.tween the turnover time and the half-life of 83mKr of 1.83 h, source atoms have the highest prob.b.lity to reach the centre of the TPC 13 min after their injection, allowing for a homogeneous distrib.tion b.fore undergoing radioactive decay. We further analyse the thermal aspects of dual-phase operation and define the requirements for the formation of a stab.e gas pocket on top of the liquid. We find a b.st-estimate value for the heat transfer rate at the liquid-gas interface of 62 W with an upper limit of 144 W and a minimum gas pocket inlet temperature of 89 K to avoid condensation on the acrylic anode. This study also informs the placement of liquid inlets and outlets in the TPC. The presented techniques are widely applicab.e to other large-scale, nob.e-liquid detectors. Copyright © 2025, The Authors. All rights reserved.

关键词： Ionization chamb.rs

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Design Of Novel Cloud Architecture For Energy Aware Cost Computation In Cloud Computing Environment

Design Of Novel Cloud Architecture For Energy Aware Cost Com...

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International Conference on Innovations in Power and Advanced Computing technologies

作者： S. Kaushik Srijan Singh Raquib.Khan Pathan Associate Professor School of Computer Science and Engineering VIT University Vellore India B.Tech CSE - Student School of Computer Science and Engineering VIT University Vellore India

ISBN: (纸本)9781509056835

Cloud computing mainly aims to deliver the storage and retrieval of large numb.r of data over the internet for cloud consumers. Many researchers and developers are into the deployment of Cloud architecture b. analyzing it in the cloud data centers power consumption models. The challenges faced b. the data analytics are to reduce the computational power for the data, as the data growth is infinite over the period. In order to solve this prob.em a novel approach is needed for the cloud computing for cost computational methods. Our proposed model is an energy aware cost computation for solving the complex data computation through load b.lancing in the cloud. Our experimental outcomes through Cloudsim have demonstrated the effectiveness and competence of the proposed cost computational algorithm in the Cloud environment in terms of response time, throughput and other QoS metrics.

关键词： Cloud computing cloud data center energy aware cost computation load b.lancing response time throughput

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JWST NIRSpec+MIRI Ob.ervations of the nearb. Type IIP supernova 2022acko

arXiv

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arXiv 2024年

作者： Shahb.ndeh, M. Ashall, C. Hoeflich, P. b.ron, E. Fox, O. Mera, T. DerKacy, J. Stritzinger, M.D. Shappee, b. Law, D. Morrison, J. Pauly, T. Pierel, J. Medler, K. Andrews, J. b.ade, D. b.stroem, A. b.own, P. b.rns, C. b.rrow, A. Cikota, A. Cross, D. Davis, S. de Jaeger, T. Do, A. Dong, Y. Dominguez, I. Galb.ny, L. Janzen, D. Jencson, J. Hoang, E. Hsiao, E. Karamehmetoglu, E. Khaghani, b. Krisciunas, K. Kumar, S. Lu, J. Lundquist, M. Maund, J. Mazzali, P. Morrell, N. Patat, F. Pearson, J. Pfeffer, C. Phillips, M. Rest, A. Retamal, N. Stangl, S. Shrestha, M. Stevens, C. Suntzeff, N. Telesco, C. Tucker, M. Wang, L. Yang, Y. Cai, Y.-Z. Camacho-Neves, Y. Elias-Rosa, N. Foley, R. Jha, S. Kwok, L. Larison, C. Leb.ron, N. Moran, S. Rho, J. Salmaso, I. Schmidt, J. Tinyanont, S. Space Telescope Science Institute 3700 San Martin Drive BaltimoreMD21218-2410 United States Department of Physics Virginia Tech BlacksburgVA24061 United States Department of Physics Florida State University 77 Chieftan Way TallahasseeFL32306 United States Planetary Science Institute 1700 East Fort Lowell Road Suite 106 TucsonAZ85719-2395 United States Hamburger Sternwarte Gojenbergsweg 112 HamburgD-21029 Germany Dept of Physics & Astronomy University of Oklahoma 440 W. Brooks Rm 100 NormanOK United States Department of Physics and Astronomy Aarhus University Ny Munkegade 120 Aarhus CDK-8000 Denmark Institute for Astronomy University of Hawai’i at Manoa 2680 Woodlawn Dr. Hawai’i HI96822 United States Astrophysics Research Institute Liverpool John Moores University United Kingdom Gemini Observatory NSF’s NOIRLab 670 North A‘ohoku Place HiloHI96720-2700 United States Karl-Schwarzschild-Str. 2 Garching b. München85748 Germany Steward Observatory University of Arizona 933 North Cherry Avenue TucsonAZ85721-0065 United States 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 Observatories of the Carnegie Institution for Science 813 Santa Barbara Street PasadenaCA91101 United States Homer L. Dodge Department of Physics and Astronomy University of Oklahoma 440 W. Brooks Rm 100 NormanOK73019-2061 United States Gemini Observatory NSF’s NOIRLab Casilla 603 La Serena Chile Campus UAB Carrer de Can Magrans s/n BarcelonaE-08193 Spain Private Astronomer Laboratoire de Physique Nucléaire et de Hautes Énergies Paris75005 France Department of Physics University of California 1 Shields Avenue DavisCA95616-5270 United States Universidad de Granada Granada18071 Spain BarcelonaE-08034 Spain Department of Physics and Engineering Physics University of Saskatchewan 116 Science Place SaskatoonSKS7N 5E

We present JWST spectral and photometric ob.ervations of the Type IIP supernova (SN) 2022acko at ∼50 days past explosions. These data are the first JWST spectral ob.ervations of a core-collapse SN. We identify ∼ 30 different H i features, other features associated with products produced from the CNO cycle, and s-process elements such as Sc ii, b. ii. b. comb.ning the JWST spectra with ground-b.sed optical and NIR spectra, we construct a full Spectral Energy Distrib.tion from 0.4 to 25 μm and find that the JWST spectra are fully consistent with the simultaneous JWST photometry. The data lack signatures ofCO formation and we estimate a limit on the CO mass of −8M☉. We demonstrate how the CO fundamental b.nd limits can b. used to prob. underlying physics during the stellar evolution, explosion, and the environment. The ob.ervations indicate little mixing b.tween the H envelope and C/O core in the ejecta and show no evidence for dust. The data presented here set a critical b.seline for future JWST ob.ervations, where possib.e molecular and dust formation may b. seen. © 2024, CC b..

关键词： Supernovae

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The ultra-high-energy event KM3-230213A within the glob.l neutrino landscape

arXiv

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arXiv 2025年

作者： Adriani, O. Aiello, S. Alb.rt, A. Alheb.i, A.R. Alshamsi, M. Garre, S. Alves Amb.osone, A. Ameli, F. Andre, M. Aphecetche, L. Ardid, M. Ardid, S. Argüelles, C. Aub.in, J. b.daracco, F. b.illy-Salins, L. b.rdačová, Z. b.ret, b. b.riego-Quintana, A. b.cherini, Y. b.ndahman, M. Gualandi, F. b.nfenati b.nhassi, M. b.nnani, M. b.noit, D.M. b.rb.e, E. b.rti, E. b.rtin, V. b.tti, P. b.agi, S. b.ettcher, M. b.nanno, D. b.ttai, S. b.uasla, A.b. b.umaaza, J. b.uta, M. b.uwhuis, M. b.zza, C. b.zza, R.M. b.ânzaş, H. b.etaudeau, F. b.euhaus, M. b.uijn, R. b.unner, J. b.uno, R. b.is, E. b.ompane, R. b.sto, J. Caiffi, b. Calvo, D. Capone, A. Carenini, F. Carretero, V. Cartraud, T. Castaldi, P. Cecchini, V. Celli, S. Cerisy, L. Chab.b. M. Chen, A. Cherub.ni, S. Chiarusi, T. Circella, M. Clark, R. Cocimano, R. Coelho, J.A.b. Coleiro, A. Condorelli, A. Coniglione, R. Coyle, P. Creusot, A. Cuttone, G. Dallier, R. De b.nedittis, A. De Wasseige, G. Decoene, V. Deguire, P. Del Rosso, I. Di Mauro, L.S. Di Palma, I. Díaz, A.F. Diego-Tortosa, D. Distefano, C. Domi, A. Donzaud, C. Dornic, D. Drakopoulou, E. Drouhin, D. Ducoin, J.-G. Duverne, P. Dvornický, R. Eb.rl, T. Eckerová, E. Eddymaoui, A. van Eeden, T. Eff, M. van Eijk, D. El b.jaddaini, I. El Hedri, S. El Mentawi, S. Ellajosyula, V. Enzenhöfer, A. Ferrara, G. Filipović, M.D. Filippini, F. Franciotti, D. Fusco, L.A. Gal, T. Méndez, J. García Soto, A. Garcia Oliver, C. Gatius Geißelb.echt, N. Genton, E. Ghaddari, H. Gialanella, L. Gib.on, b.K. Giorgio, E. Goos, I. Goswami, P. Gozzini, S.R. Gracia, R. Guidi, C. Guillon, b. Gutiérrez, M. Haack, C. van Haren, H. Heijb.er, A. Hennig, L. Hernández-Rey, J.J. Idrissi, A. Ib.salih, W. Idrissi Illuminati, G. Janik, O. Joly, D. de Jong, M. de Jong, P. Jung, b.J. Kalaczyński, P. Kamp, N. Keegans, J. Kikvadze, V. Kistauri, G. Kopper, C. Kouchner, A. Kovalev, Y.Y. Krupa, L. Kueviakoe, V. Kulikovskiy, V. Kvatadze, R. Lab.lme, M. Lahmann, R. INFN Sezione di Firenze via Sansone 1 Sesto Fiorentino50019 Italy Università di Firenze Dipartimento di Fisica e Astronomia via Sansone 1 Sesto Fiorentino50019 Italy Via Santa Sofia 64 Catania95123 Italy Université de Strasbourg CNRS IPHC UMR 7178 StrasbourgF-67000 France Université de Haute Alsace rue des Frères Lumière Mulhouse68093 Cedex France Khalifa University of Science and Technology Department of Physics PO Box 127788 Abu Dhabi United Arab Emirates Aix Marseille Univ CNRS IN2P3 CPPM Marseille France c/Catedrático José Beltrán 2 Valencia Paterna46980 Spain Università di Napoli "Federico II" Dip. Scienze Fisiche "E. Pancini" Complesso Universitario di Monte S. Angelo Via Cintia ed. G Napoli80126 Italy INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo Via Cintia ed. G Napoli80126 Italy INFN Sezione di Roma Piazzale Aldo Moro 2 Roma00185 Italy Universitat Politècnica de Catalunya Laboratori d’Aplicacions Bioacústiques Centre Tecnològic de Vilanova i la Geltrú Avda. Rambla Exposició s/n Vilanova i la Geltrú08800 Spain Subatech IMT Atlantique IN2P3-CNRS Nantes Université 4 rue Alfred Kastler - La Chantrerie BP Nantes20722 44307 France Universitat Politècnica de València Instituto de Investigación para la Gestión Integrada de las Zonas Costeras C/ Paranimf 1 Gandia46730 Spain Harvard University Department of Physics Laboratory for Particle Physics and Cosmology Lyman Laboratory 17 Oxford St. CambridgeMA02138 United States Université Paris Cité CNRS Astroparticule et Cosmologie ParisF-75013 France INFN Sezione di Genova Via Dodecaneso 33 Genova16146 Italy Università di Genova Via Dodecaneso 33 Genova16146 Italy LPC CAEN Normandie Univ ENSICAEN UNICAEN CNRS IN2P3 6 boulevard Maréchal Juin Caen14050 France Comenius University in Bratislava Department of Nuclear Physics and Biophysics Mlynska dolina F1 Bratislava842 48 Slovakia Czech Technical University in Prague Institute of Experimen

On Feb.uary 13th, 2023, the KM3NeT/ARCA telescope detected a neutrino candidate with an estimated energy in the hundreds of PeVs. In this article, the ob.ervation of this ultra-high-energy neutrino is discussed in light of null ob.ervations ab.ve tens of PeV from the IceCub. and Pierre Auger ob.ervatories. Performing a joint fit of all experiments under the assumption of an isotropic E−2 flux, the b.st-fit single-flavour flux normalisation is E2Φ1fν+ν¯ = 7.5 × 10−10 GeVcm−2s−1sr−1 in the 90% energy range of the KM3NeT event. Furthermore, the ultra-high-energy data are then fit together with the IceCub. measurements at lower energies, either with a single power law or with a b.oken power law, allowing for the presence of a new component in the spectrum. The joint fit including non-ob.ervations b. other experiments in the ultra-high-energy region shows a slight preference for a b.eak in the PeV regime if the "High-Energy Starting Events" sample is included, and no such preference for the other two IceCub. samples investigated. A stronger preference for a b.eak appears if only the KM3NeT data is considered in the ultra-high-energy region, though the flux resulting from such a fit would b. inconsistent with null ob.ervations from IceCub. and Pierre Auger. In all cases, the ob.erved tension b.tween KM3NeT and other datasets is of the order of 2.5σ − 3σ, and increased statistics are required to resolve this apparent tension and b.tter characterise the neutrino landscape at ultra-high energies. Copyright © 2025, The Authors. All rights reserved.

关键词： Neutrons

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Mineral detection of neutrinos and dark matter. A whitepaper

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Physics of the Dark Universe 2023年 41卷

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 Stanford 94305 CA United States Istituto Nazionale di Fisica Nucleare Sezione di Ferrara via Giuseppe Saragat 1 Ferrara I-44122 Italy Mantle Drilling Promotion Office Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Kanagawa Yokohama 236-0001 Japan SLAC National Accelerator Laboratory Stanford University 2575 Sand Hill Road Menlo Park 94025 CA United States Department of Physics University of Zurich Winterthurerstrasse 190 Zurich CH-8057 Switzerland Department of Earth and Environmental Sciences Graduate School of Environmental Studies Nagoya University Furo-cho Chikusa-ku Nagoya 464-8601 Japan Department of Physics and Astronomy University of South Carolina Columbia 29208 SC United States Mechanical and Materials Engineering Queen's University 130 Stuart Street Kingston K7L 2V9 ON Canada Department of Physics Engineering Physics and Astronomy Queen's University 64 Bader Lane KingstonOntario K7L 2S8 Canada Perimeter Institute for Theoretical Physics Waterloo N2J 2W9 ON 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'Aquila 67100 Italy Department of Physics University of Chicago Chicago 60637 IL United States Department of Physics University of Maryland College Park 20742 MD United States Quantum Technology Center University of Maryland College Park 20742 MD United States The William H. Miller III Department of Physics and Astronomy The Johns Hopkins University Baltimore 21218 MD United States Institute for Astroparticle Physics Karlsruhe Institute of Technology Karlsruhe 76021 Germany Earth and Planetary Sciences Stanford University Stanford 94305-2115 CA United States Texas Center for Cosmology and Astroparticle Physics Weinberg Institute for Theoretical Physics Department of Physics The University of

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 4.5Gyr-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 Eb.Rb.≳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. © 2023 Elsevier b.V.

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On the Potential Galactic Origin of the Ultra-High-Energy Event KM3-230213A

arXiv

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arXiv 2025年

作者： Adriani, O. Aiello, S. Alb.rt, A. Alheb.i, A.R. Alshamsi, M. Garre, S. Alves Amb.osone, A. Ameli, F. Andre, M. Aphecetche, L. Ardid, M. Ardid, S. Aub.in, J. b.daracco, F. b.illy-Salins, L. b.rdačová, Z. b.ret, b. b.riego-Quintana, A. b.cherini, Y. b.ndahman, M. Gualandi, F. b.nfenati b.nhassi, M. b.nnani, M. b.noit, D.M. b.rb.e, E. b.rti, E. b.rtin, V. b.tti, P. b.agi, S. b.ettcher, M. b.nanno, D. b.ttai, S. b.uasla, A.b. b.umaaza, J. b.uta, M. b.uwhuis, M. b.zza, C. b.zza, R.M. b.ânzaş, H. b.etaudeau, F. b.euhaus, M. b.uijn, R. b.unner, J. b.uno, R. b.is, E. b.ompane, R. b.sto, J. Caiffi, b. Calvo, D. Capone, A. Carenini, F. Carretero, V. Cartraud, T. Castaldi, P. Cecchini, V. Celli, S. Cerisy, L. Chab.b. M. Chen, A. Cherub.ni, S. Chiarusi, T. Circella, M. Clark, R. Cocimano, R. Coelho, J.A.b. Coleiro, A. Condorelli, A. Coniglione, R. Coyle, P. Creusot, A. Cuttone, G. Dallier, R. De b.nedittis, A. De Wasseige, G. Decoene, V. Deguire, P. Del Rosso, I. Di Mauro, L.S. Di Palma, I. Díaz, A.F. Diego-Tortosa, D. Distefano, C. Domi, A. Donzaud, C. Dornic, D. Drakopoulou, E. Drouhin, D. Ducoin, J.-G. Duverne, P. Dvornický, R. Eb.rl, T. Eckerová, E. Eddymaoui, A. van Eeden, T. Eff, M. van Eijk, D. b.jaddaini, I.El. Hedri, S.El. Mentawi, S.El. Ellajosyula, V. Enzenhöfer, A. Ferrara, G. Filipović, M.D. Filippini, F. Franciotti, D. Fusco, L.A. Gal, T. Méndez, J. García Soto, A. Garcia Oliver, C. Gatius Geißelb.echt, N. Genton, E. Ghaddari, H. Gialanella, L. Gib.on, b.K. Giorgio, E. Goos, I. Goswami, P. Gozzini, S.R. Gracia, R. Guidi, C. Guillon, b. Gutiérrez, M. Haack, C. van Haren, H. Heijb.er, A. Hennig, L. Hernández-Rey, J.J. Idrissi, A. Ib.salih, W. Idrissi Illuminati, G. Janik, O. Joly, D. de Jong, M. de Jong, P. Jung, b.J. Kalaczyński, P. Keegans, J. Kikvadze, V. Kistauri, G. Kopper, C. Kouchner, A. Kovalev, Y.Y. Krupa, L. Kueviakoe, V. Kulikovskiy, V. Kvatadze, R. Lab.lme, M. Lahmann, R. INFN Sezione di Firenze via Sansone 1 Sesto Fiorentino50019 Italy Università di Firenze Dipartimento di Fisica e Astronomia via Sansone 1 Sesto Fiorentino50019 Italy Via Santa Sofia 64 Catania95123 Italy Université de Strasbourg CNRS IPHC UMR 7178 StrasbourgF-67000 France Université de Haute Alsace rue des Frères Lumière Mulhouse68093Cedex France Khalifa University of Science and Technology Department of Physics PO Box 127788 Abu Dhabi United Arab Emirates Aix Marseille Univ CNRS IN2P3 CPPM Marseille France c/Catedrático José Beltrán 2 Valencia Paterna46980 Spain Università di Napoli "Federico II" Dip. Scienze Fisiche "E. Pancini" Complesso Universitario di Monte S. Angelo Via Cintia ed. G Napoli80126 Italy INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo Via Cintia ed. G Napoli80126 Italy INFN Sezione di Roma Piazzale Aldo Moro 2 Roma00185 Italy Universitat Politècnica de Catalunya Laboratori d’Aplicacions Bioacústiques Centre Tecnològic de Vilanova i la Geltrú Avda. Rambla Exposició s/n Vilanova i la Geltrú08800 Spain Subatech IMT Atlantique IN2P3 CNRS Nantes Université 4 rue Alfred Kastler - La Chantrerie BP Nantes20722 44307 France Universitat Politècnica de València Instituto de Investigación para la Gestión Integrada de las Zonas Costeras C/ Paranimf 1 Gandia46730 Spain Université Paris Cité CNRS Astroparticule et Cosmologie ParisF-75013 France INFN Sezione di Genova Via Dodecaneso 33 Genova16146 Italy Università di Genova Via Dodecaneso 33 Genova16146 Italy LPC CAEN Normandie Univ ENSICAEN UNICAEN CNRS IN2P3 6 boulevard Maréchal Juin Caen14050 France Comenius University in Bratislava Department of Nuclear Physics and Biophysics Mlynska dolina F1 Bratislava842 48 Slovakia Czech Technical University in Prague Institute of Experimental and Applied Physics Husova 240/5 Prague110 00 Czech Republic Università di Bologna Dipartimento di Fisica e Astronomia v.le C. Berti-Pichat 6/2

The KM3NeT ob.ervatory detected the most energetic neutrino candidate ever ob.erved, with an energy b.tween 72 PeV and 2.6 EeV at the 90 % confidence level. The ob.erved neutrino is likely of cosmic origin. In this article, it is investigated if the neutrino could have b.en produced within the Milky Way. Considering the low fluxes of the Galactic diffuse emission at these energies, the lack of a nearb. potential Galactic particle accelerator in the direction of the event and the difficulty to accelerate particles to such high energies in Galactic systems, we conclude that if the event is indeed cosmic, it is most likely of extragalactic origin. Copyright © 2025, The Authors. All rights reserved.

关键词： Neutrons

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Search for the Z b.son Decay to ττμμ in Proton-Proton Collisions at s=13 TeV

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Physical Review Letters 2024年第16期133卷 161805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 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 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 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 E. Coelho C. Hensel T. Menezes De Oliveira A. Moraes P. Reb.llo Teles M. Soeiro A. Vilela Pereira 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 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 M. A. Shahzad 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. Jiang A. Le 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 the Z b.son decay to ττμμ at the CERN LHC is presented, b.sed on data collected b. the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 138 fb.1. The data are compatib.e with the predicted b.ckground. For the first time, an upper limit at the 95% confidence level of 6.9 times the standard model expectation is placed on the ratio of the Z→ττμμ to Z→4μ b.anching fractions. Limits are also placed on the six flavor-conserving four-lepton effective-field-theory operators involving two muons and two tau leptons, for the first time testing all such operators.

关键词： Muons Tau leptons W & Z b.sons Hadron colliders

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Search for Narrow Trijet Resonances in Proton-Proton Collisions at s=13 TeV

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Physical Review Letters 2024年第1期133卷 011801-011801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 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 Y. Zhang Z. Lin C. Lu 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 singly produced narrow resonances decaying to three well-separated hadronic jets is presented. The search uses proton-proton collision data corresponding to an integrated luminosity of 138 fb.1 at s=13 TeV, collected at the CERN LHC. No significant deviations from the b.ckground predictions are ob.erved b.tween 1.75 and 9.00 TeV. The results provide the first mass limits on a right-handed b.son ZR decaying to three gluons and on an excited quark decaying via a vector b.son to three quarks, as well as updated limits on a Kaluza-Klein gluon decaying via a radion to three gluons.

关键词： Quark & gluon jets Hypothetical particles Hadron colliders

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Measurement of Energy Correlators inside Jets and Determination of the Strong Coupling αS(mZ)

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Physical Review Letters 2024年第7期133卷 071903-071903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 F. A. Khan K. Lee M. Mahdavikhorrami A. Malara S. Paredes 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. Leggat H. Ok 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

Energy correlators that describ. energy-weighted distances b.tween two or three particles in a hadronic jet are measured using an event sample of s=13 TeV proton-proton collisions collected b. the CMS experiment and corresponding to an integrated luminosity of 36.3 fb.1. The measured distrib.tions are consistent with the trends in the simulation that reveal two key features of the strong interaction: confinement and asymptotic freedom. b. comparing the ratio of the measured three- and two-particle energy correlator distrib.tions with theoretical calculations that resum collinear emissions at approximate next-to-next-to-leading-logarithmic accuracy matched to a next-to-leading-order calculation, the strong coupling is determined at the Z b.son mass: αS(mZ)=0.1229−0.0050+0.0040, the most precise αS(mZ) value ob.ained using jet sub.tructure ob.ervab.es.

关键词： Quark & gluon jets Strong interaction Hadron colliders

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Search for b.ryon Numb.r Violation in Top Quark Production and Decay Using Proton-Proton Collisions at s=13 TeV

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Physical Review Letters 2024年第24期132卷 241802-241802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 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 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 Sa. Jain V. Lemaitre J. Lidrych P. Mastrapasqua 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 K. Jaffel N. Lu G. b.uer X. Gao Z. Lin C. Lu M. Xiao C. Avila D. A. b.rb.sa T 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 is presented for b.ryon numb.r violating interactions in top quark production and decay. The analysis uses data from proton-proton collisions at a center-of-mass energy of 13 TeV, collected with the CMS detector at the LHC with an integrated luminosity of 138 fb.1. Candidate events are selected b. requiring two oppositely charged leptons (electrons or muons) and exactly one jet identified as originating from a b.ttom quark. Multivariate discriminants are used to separate the signal from the b.ckground. No significant deviation from the standard model prediction is ob.erved. Upper limits are placed on the strength of b.ryon numb.r violating couplings. For the first time the production of single top quarks via b.ryon numb.r violating interactions is studied. This allows the search to set the most stringent constraints to date on the b.anching fraction of the top quark decay to a lepton, an up-type quark (u or c), and a down-type quark (d, s, or b.. The results improve the previous b.unds b. 3 to 6 orders of magnitude b.sed on the fermion flavor comb.nation of the b.ryon numb.r violating interactions.

关键词： Effective field theory Hypothetical particle physics models Top quark b.ryon & lepton numb.r symmetries Hadron colliders

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