Measurement of the effective leptonic weak mixing angle

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. 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. Bartolini, M. 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. Bellee, V. 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. Bondar, N. Bordelius, A. Borgato, F. Borghi, S. Borsato, M. Borsuk, J.T. Bouchiba, S.A. Bovill, M. Bowcock, T.J.V. Boyer, A. Bozzi, C. Rodriguez, A. Brea Breer, N. Brodzicka, J. Gonzalo, A. Brossa Brown, J. Brundu, D. Buchanan, E. Buonaura, A. Buonincontri, L. 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. Capriotti, L. Caravaca-Mora, R. 

作者机构：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  Gif-sur-Yvette 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  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 for Subatomic Physics Amsterdam Netherlands Nikhef National Institute for Subatomic Physics VU University Amsterdam Amsterdam Netherlands AGH - University of Krakow Faculty of Physics and Applied Computer Science Kraków Poland Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences Kraków Poland  Warsaw Poland Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest-Magurele Romania Affiliated with an institute covered by a cooperation agreement with CERN DS4DS La Salle Universitat Ramon Llull Barcelona Spain ICCUB Universitat de Barcelona Barcelona Spain  Universidade de Santiago de Compostela Santiago de Compostela Spain Instituto de Fisica Corpuscular Centro Mixto Universidad de Valencia - CSIC Valencia Spain  Geneva Switzerland  Lausanne Switzerland Physik-Institut Universität Zürich Zürich Switzerland  Kharkiv Ukraine  Kyiv Ukraine School of Physics and Astronomy University of Birmingham Birmingham United Kingdom H.H. Wills Physics Laboratory University of Bristol Bristol United Kingdom Cavendish Laboratory University of Cambridge Cambridge United Kingdom Department of Physics University of Warwick Coventry United Kingdom STFC Rutherford Appleton Laboratory Didcot United Kingdom School of Physics and Astronomy University of Edinburgh Edinburgh United Kingdom School of Physics and Astronomy University of Glasgow Glasgow United Kingdom Oliver Lodge Laboratory University of Liverpool Liverpool United Kingdom Imperial College London London United Kingdom Department of Physics and Astronomy University of Manchester Manchester United Kingdom Department of Physics University of Oxford Oxford United Kingdom Massachusetts Institute of Technology CambridgeMA United States University of Cincinnati CincinnatiOH United States University of Maryland College ParkMD United States  Los AlamosNM United States Syracuse University SyracuseNY United States  Rio de Janeiro Brazil School of Physics and Electronics Hunan University Changsha City China Guangdong Provincial Key Laboratory of Nuclear Science Guangdong-Hong Kong Joint Laboratory of Quantum Matter Institute of Quantum Matter South China Normal University Guangzhou China Lanzhou University Lanzhou China School of Physics and Technology Wuhan University Wuhan China Departamento de Fisica Universidad Nacional de Colombia Bogota Colombia Ruhr Universitaet Bochum Fakultaet f. Physik und Astronomie Bochum Germany Eotvos Lorand University Budapest Hungary Van Swinderen Institute University of Groningen Groningen Netherlands Universiteit Maastricht Maastricht Netherlands Tadeusz Kosciuszko Cracow University of Technology Cracow Poland Universidade da Coruña A Coruña Spain Department of Physics and Astronomy Uppsala University Uppsala Sweden University of Michigan Ann ArborMI United States Centro Federal de Educacão Tecnológica Celso Suckow da Fonseca Rio De Janeiro Brazil 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2024年

核心收录：

主　　题：Charged particles 

摘      要：Using pp collision data at √s = 13 TeV, recorded by the LHCb experiment between 2016 and 2018 and corresponding to an integrated luminosity of 5.4 fb−1, the forward-backward asymmetry in the pp → Z/γ∗ → µ+µ− process is measured. The measurement is carried out in ten intervals of the difference between the muon pseudorapidities, within a fiducial region covering dimuon masses between 66 and 116 GeV, muon pseudorapidities between 2.0 and 4.5 and muon transverse momenta above 20 GeV. These forward-backward asymmetries are compared with predictions, at next-to-leading order in the strong and electroweak couplings. The measured effective leptonic weak mixing angle is sin2 θeff = 0.23147 ± 0.00044 ± 0.00005 ± 0.00023, where the first uncertainty is statistical, the second arises from systematic uncertainties associated with the asymmetry measurement, and the third arises from uncertainties in the fit model used to extract sin2 θeff from the asymmetry measurement. This result is based on an arithmetic average of results using the CT18, MSHT20, and NNPDF31 parameterisations of the proton internal structure, and is consistent with previous measurements and with predictions from the global electroweak fit. © 2024, CC BY.