Precision Measurement of the Muon Charge Asymmetry from W -Boson Decays in p p Collisions at s = 13 TeV in the Forward Region

Physical Review Letters 2026 Open access

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Authors: R. Aaij, M. Abdelfatah, A. S. W. Abdelmotteleb, Carlos Abellán Beteta, C. Abellán Beteta, T. Ackernley, A. A. Adefisoye, B. Adeva, M. Adinolfi, P. Adlarson, C. Agapopoulou, C. Aidala
+88 more Z. Ajaltouni, S. Akar, K. Carvalho Akiba, P. Albicocco, J. Albrecht, R. Aleksiejūnas, F. Alessio, P. Álvarez Cartelle, R. Amalric, S. Amato, S. Amato, Y. Amhis, L. An, L. Anderlini, M. Andersson, P. Andreola, M. Andreotti, Sergio Andres Estrada, Alessia Anelli, D. Ao, C. Arata, F. Archilli, Zaratsyan Areg, Matteo Argenton, S. Arguedas Cuendis, Lisa Arnone, M. Artuso, E. Aslanides, R. Ataíde Da Silva, M. Atzeni, B. Audurier, Juliette Authier, D. Bacher, I. Bachiller, S. Bachmann, Marie Bachmayer, John J Back, Z. B. Bai, P. Baladrón Rodríguez, V. Balagura, Alessandra Balboni, W. Baldini, Zachary Baldwin, Luca Balzani, Huirong Bao, J. Baptista de Souza Leite, C. Barbero Pretel, M. Barbetti, I. R. Barbosa, Roger John Barlow, Mikhail Barnyakov, S. Barsuk, W. Barter, W. Barter, B. Batsukh, B. Batsukh, Piera Battista, Ali Bavarchee, A. Bay, A. Beck, M. Becker, F. Bedeschi, I. Bediaga, Noah Albin Behling, S. Belin, Alberto Bellavista, I. Belov, I. Belyaev, G. Benane, G. Bencivenni, E. Ben-Haim, R. Bernet, A. Bertolin, F. Betti, J. Bex, Oleg Bezshyyko, Senjuti Bhattacharya, M. S. Bieker, N. V. Biesuz, Alice Biolchini, M. Birch, F. C. R. Bishop, A. Bitadze, A. Bizzeti, T. Blake, F. Blanc, J. E. Blank, S. Blusk
DOI: 10.1103/vgg4-wnhr
Cited by: 1
References: 61

Abstract

A precision measurement of the muon charge asymmetry from W -boson decays in proton-proton collisions at s = 13 TeV is presented. The analysis utilizes data corresponding to an integrated luminosity of 5.1 fb − 1 , recorded by the LHCb detector during 2016, 2017, and 2018. The asymmetry is measured for muons with transverse momentum between 25 and 55 GeV and pseudorapidity between 2.0 and 4.5. This result represents the most precise determination of the muon charge asymmetry in the forward region to date, exhibiting excellent agreement with next-to-next-to-leading-order predictions in perturbative quantum chromodynamics. The measured asymmetries are corrected for experimental efficiencies, resolution, and final-state photon radiation.

Fields of Study & Subjects

Particle physics theoretical and experimental studies High-Energy Particle Collisions Research Neutrino Physics Research

Publication details

Journal / source
Physical Review Letters
Publisher
American Physical Society (APS)
Volume
137
Issue
11
Publication date
16 June 2026
Language
EN