Measurement of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi></mml:math>-Boson Mass

The first dedicated Z-boson mass measurement at the LHC with Z→μ^{+}μ^{-} decays is reported. The dataset uses proton-proton collisions at a center-of-mass energy of 13 TeV, recorded in 2016 by the LHCb experiment, and corresponds to an integrated luminosity of 1.7 fb^{-1}. A template fit to the μ^{+}μ^{-} mass distribution yields the following result for the Z-boson mass: m_{Z}=91,185.7±8.3±3.9 MeV, where the first uncertainty is statistical and the second systematic. This result is consistent with previous measurements and predictions from global electroweak fits.

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Journal
Physical Review Letters
Published
2025-10-17
DOI
https://doi.org/10.1103/ydn7-qx1d
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Particle physics theoretical and experimental studies
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article
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article

Measurement of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi></mml:math>-Boson Mass

L. De Paula, A. Seuthe, I. Corredoira, M. M. Duras et al.
Physical Review Letters
Particle physics theoretical and experimental studies
article

Measurement of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi></mml:math>-Boson Mass

L. De Paula, A. Seuthe, I. Corredoira, M. M. Duras, D. Martínez Santos, W. Liu, R. Fantechi, A. Lobo Salvia, S. Schulte, M. Martinelli, S. Sheng, J. de Boer, H.-P. Dembinski, J. Yu, O. Leroy, S. Jakobsen, J. Heuel, B. Saitta, H. Tilquin, A. Kupść, Marie Bachmayer, W. Barter, Yuki Fujii, F. Ferrari, A. Padee, A. Bertolin, D. Karpenkov, K. Richardson, G. Punzi, H. V. Cliff, G. Sarpis, S. Borghi, F. Muheim, M. Guarise, P. Ilten, N. Jurik, G. Tonani, Y. Wei, Ö. Özçelik, Vukan Jevtic, K. Yang, A. Beck, D. Marangotto, V. Matiunin, J. E. Blank, E. Jiang, D. Bacher, M. Stefaniak, A. Grecu, T. Li, C. Prouvé, T. Ketel, W. Baldini, E. Jans, J. Hammerich, P. Kravchenko, K. Fischer, H. Schindler, M. Fontana, M. Monk, A. Okhotnikov, B. Passalacqua, A. Ishteev, J. Novoa Fernandez, X. Zhu, M. Pló Casasús, R. Matev, D. Saranin, A. Schopper, P. Garcia Moreno, V. Placinta, S. Ely, G. Mancinelli, F. Blanc, Rita Sadek, G. Lanfranchi, F. Pisani, D. S. Mitzel, L. Li, N. Polukhina, Ilya Segal, M. Charles, R. Williams, F. Ferreira Rodrigues, L. Kolk, Z. Xu, R. Quagliani, S. Cali, S. Easo, H. Sazak, J. Baptista de Souza Leite, A. Konoplyannikov, L. Toscano, A. Mauri, S. Poslavskii, B. Couturier, Dorothea Vom Bruch, B. Dey, R. Wang, X. Vilasís-Cardona, K. Liu, S. J. Jaimes Elles, A.-K. Guseinov, D. Nicotra, P. Collins, A. Berezhnoy, Z. Chen, C. Zhang, W. Byczynski, Louis Henry, P. Baladrón Rodríguez, H. Pereira Da Costa, A. D. Dowling, V. Shevchenko, M. Zdybał, Zakariya Aliouche, R. Manera Escalero, J. J. Back, T. Miralles, Q. Li, D. Ilin, N. Valls Canudas, E. Kulikova, José Javier Saavedra-Arias, Miguel Ruiz Diaz, D. Miao, W. Krupa, F. Borgato, S. Barsuk, M. Schiller, Y. Zhao, L. Soares Lavra, U. Egede, S. Monteil, Q. Niu, J. T. Borsuk, P. Billoir, A. Obłąkowska-Mucha, Riccardo Nunzio Pilato, M. Merk, M. Pappagallo, M. Pizzichemi, A. Gioventù, Z. Ajaltouni, N. Qin, I. R. Barbosa, L. Martinazzoli, Y. L. Liu, G. Meier, A. Biolchini, E. Rodriguez Fernandez, A. Rogovskiy, Eva Kowalczyk, G. 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article en

Abstract

The first dedicated Z-boson mass measurement at the LHC with Z→μ^{+}μ^{-} decays is reported. The dataset uses proton-proton collisions at a center-of-mass energy of 13 TeV, recorded in 2016 by the LHCb experiment, and corresponds to an integrated luminosity of 1.7 fb^{-1}. A template fit to the μ^{+}μ^{-} mass distribution yields the following result for the Z-boson mass: m_{Z}=91,185.7±8.3±3.9 MeV, where the first uncertainty is statistical and the second systematic. This result is consistent with previous measurements and predictions from global electroweak fits.

Physical Review LettersVol. 135(16)
University College Dublin (IE), Eötvös Loránd University (HU), Universidade da Coruña (ES), Universidade Federal do Rio de Janeiro (BR), Uppsala University (SE), Jagiellonian University (PL), Rutherford Appleton Laboratory (GB), Centre National de la Recherche Scientifique (FR), Los Alamos National Laboratory (US), University of Bonn (DE), École Polytechnique (FR), University of Liverpool (GB), Universitat de València (ES), University of Freiburg (DE), Hunan University (CN), Délégation Paris 7 (FR), University of Groningen (NL), Vilnius University (LT), South China Normal University (CN), Taras Shevchenko National University of Kyiv (UA), Université Clermont Auvergne (FR), Universidade de Santiago de Compostela (ES), TU Dortmund University (DE), Peking University (CN), University of Zurich (CH), Université Paris Cité (FR), Aix-Marseille Université (FR), Heidelberg University (DE), University of Cambridge (GB), Cracow University of Technology (PL), Pontifícia Universidade Católica do Rio de Janeiro (BR), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), Université Paris-Saclay (FR), University of Michigan (US), Kharkiv Institute of Physics and Technology (UA), Australian Regenerative Medicine Institute (AU), University of Manchester (GB), Maastricht University (NL), University of Bristol (GB), Universidad Nacional de Colombia (CO), Wuhan University (CN), University of Warwick (GB), Sorbonne Université (FR), University of Oxford (GB), Central China Normal University (CN), Sorbonne Paris Cité (FR), Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering (RO), National Institute for Subatomic Physics (NL), National Centre for Nuclear Research (PL), Instituto de Física Corpuscular (ES), Laboratoire de Physique Nucléaire et de Hautes Énergies (FR), Istituto Nazionale di Fisica Nucleare, Sezione di Padova (IT), Institute of Nuclear Physics, Polish Academy of Sciences (PL), Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Bari (IT), Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata (IT), FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ), Centro Brasileiro de Pesquisas Físicas (BR), Istituto Nazionale di Fisica Nucleare, Sezione di Genova (IT), CEA Paris-Saclay (FR), Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari (IT), Los Alamos National Security (United States) (US), Istituto Nazionale di Fisica Nucleare, Sezione di Firenze (IT), Institut National de Physique Nucléaire et de Physique des Particules (FR), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (FR), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (IT), Institute of High Energy Physics (CN), Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca (IT), Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati (IT), Institute for Nuclear Research (UA), Istituto Nazionale di Fisica Nucleare, Sezione di Bologna (IT), Laboratoire Leprince-Ringuet (FR), Max Planck Institute for Nuclear Physics (DE), Istituto Nazionale di Fisica Nucleare, Sezione di Roma I (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Pisa (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Perugia (IT), University of Chinese Academy of Sciences (CN), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR), Consejo Nacional de Rectores, Laboratoire Médiations (FR), State Key Laboratory of Nuclear Physics and Technology, Imperial College London (GB), École Polytechnique Fédérale de Lausanne (CH), The Ohio State University (US), Universitat Ramon Llull (ES), Monash University (AU), University of Cincinnati (US), Massachusetts Institute of Technology (US), University of Maryland, College Park (US), European Organization for Nuclear Research (CH), AGH University of Krakow (PL), Université Savoie Mont Blanc (FR), Syracuse University (US), Universitat de Barcelona (ES), Henan Normal University (CN), Lanzhou University (CN), University of Glasgow (GB), University of Birmingham (GB), RWTH Aachen University (DE), Ruhr University Bochum (DE), University of Edinburgh (GB), Tsinghua University (CN)
National Science Foundation, U.S. Department of Energy, CERN, UK Research and Innovation, Ministerul Cercetării, Inovării şi Digitalizării, Institutul National de Cercetare-Dezvoltare pentru Fizica si Inginerie Nucleara 'Horia Hulubei', Leverhulme Trust, European Commission, Deutsche Forschungsgemeinschaft, Agence Nationale de la Recherche, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, National Natural Science Foundation of China, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Bundesministerium für Bildung und Forschung, Nederlandse Organisatie voor Wetenschappelijk Onderzoek, Generalitat Valenciana, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Max-Planck-Gesellschaft, Ministerstwo Edukacji i Nauki, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, National Academy of Sciences of Ukraine, Centre National de la Recherche Scientifique, Financiadora de Estudos e Projetos, Région Auvergne-Rhône-Alpes, CAS Center for Excellence in Particle Physics, Australian Research Data Commons, Science and Technology Facilities Council, Deutsches Elektronen-Synchrotron, Agencia Estatal de Investigación, Institute of High Energy Physics, Fundamental Research Funds for the Central Universities, Institut National de Physique Nucléaire et de Physique des Particules, Nuclear Physics, H2020 Marie Skłodowska-Curie Actions
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Particle physics theoretical and experimental studies
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