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

LHCb Collaboration

doi:10.1103/vgg4-wnhr

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

LHCb Collaboration

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1 Scopus citations

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.

Original language	English
Article number	111801
Journal	Physical Review Letters
Volume	137
Issue number	11
DOIs	https://doi.org/10.1103/vgg4-wnhr
State	Published - 11 Sep 2026

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@article{b0951fa78f55410e9d2f900890567489,

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

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.",

author = "\{LHCb Collaboration\} and R. Aaij and M. Abdelfatah and Abdelmotteleb, \{A. S.W.\} and \{Abellan Beteta\}, C. and F. Abudin{\'e}n and T. Ackernley and Adefisoye, \{A. A.\} and B. Adeva and M. Adinolfi and P. Adlarson and C. Agapopoulou and Aidala, \{C. A.\} and Z. Ajaltouni and S. Akar and K. Akiba and P. Albicocco and J. Albrecht and R. Aleksiejunas and F. Alessio and \{Alvarez Cartelle\}, P. and R. Amalric and S. Amato and Amey, \{J. L.\} and Y. Amhis and L. An and L. Anderlini and M. Andersson and P. Andreola and M. Andreotti and \{Andres Estrada\}, S. and A. Anelli and D. Ao and C. Arata and F. Archilli and Z. Areg and M. Argenton and \{Arguedas Cuendis\}, S. and L. Arnone and M. Artuso and E. Aslanides and \{Ata{\'i}de Da Silva\}, R. and M. Atzeni and B. Audurier and Authier, \{J. A.\} and D. Bacher and \{Bachiller Perea\}, I. and S. Bachmann and M. Bachmayer and Milanes, \{D. A.\} and E. Shmanin",

note = "Publisher Copyright: {\textcopyright} 2026 CERN.",

year = "2026",

month = sep,

day = "11",

doi = "10.1103/vgg4-wnhr",

language = "English",

volume = "137",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "11",

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TY - JOUR

T1 - Precision Measurement of the Muon Charge Asymmetry from W -Boson Decays in pp Collisions at s =13 TeV in the Forward Region

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abdelfatah, M.

AU - Abdelmotteleb, A. S.W.

AU - Abellan Beteta, C.

AU - Abudinén, F.

AU - Ackernley, T.

AU - Adefisoye, A. A.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adlarson, P.

AU - Agapopoulou, C.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Akiba, K.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Aleksiejunas, R.

AU - Alessio, F.

AU - Alvarez Cartelle, P.

AU - Amalric, R.

AU - Amato, S.

AU - Amey, J. L.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andersson, M.

AU - Andreola, P.

AU - Andreotti, M.

AU - Andres Estrada, S.

AU - Anelli, A.

AU - Ao, D.

AU - Arata, C.

AU - Archilli, F.

AU - Areg, Z.

AU - Argenton, M.

AU - Arguedas Cuendis, S.

AU - Arnone, L.

AU - Artuso, M.

AU - Aslanides, E.

AU - Ataíde Da Silva, R.

AU - Atzeni, M.

AU - Audurier, B.

AU - Authier, J. A.

AU - Bacher, D.

AU - Bachiller Perea, I.

AU - Bachmann, S.

AU - Bachmayer, M.

AU - Milanes, D. A.

AU - Shmanin, E.

PY - 2026/9/11

Y1 - 2026/9/11

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/105050298942

U2 - 10.1103/vgg4-wnhr

DO - 10.1103/vgg4-wnhr

M3 - Article

AN - SCOPUS:105050298942

SN - 0031-9007

VL - 137

JO - Physical Review Letters

JF - Physical Review Letters

IS - 11

M1 - 111801

ER -

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

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