Measurement of the effective leptonic weak mixing angle

The LHCb collaboration

doi:10.1007/JHEP12(2024)026

Measurement of the effective leptonic weak mixing angle

The LHCb collaboration

National Institute for Subatomic Physics
University of Warwick
University of Zurich
University of Liverpool
Syracuse University
Instituto Galego de Física de Altas Enerxías (IGFAE)
University of Bristol
Uppsala University
Université Paris-Saclay
University of Michigan, Ann Arbor
Université Clermont Auvergne
University of Cincinnati
National Institute for Nuclear Physics
TU Dortmund University
CERN
University of Glasgow
University of Manchester
University of Cambridge
Sorbonne Université
Universidade Federal do Rio de Janeiro
Peking University
University of Milan - Bicocca
University of Chinese Academy of Sciences
University of Rome Tor Vergata
Consejo Nacional de Rectores (CONARE)
CPPM
Swiss Federal Institute of Technology Lausanne
Massachusetts Institute of Technology
Departement de Physique Nucleaire (SPhN)
University of Oxford
Université Savoie Mont Blanc
Heidelberg University
Laboratoire Leprince-Ringuet
Pontifícia Universidade Católica do Rio de Janeiro
University of Edinburgh
RWTH Aachen University
AGH University of Krakow
Scuola Normale Superiore di Pisa
CAS - Institute of High Energy Physics
Centro Brasileiro de Pesquisas Físicas
Ramon Llull University
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Imperial College London
Maastricht University
University of Ferrara
University of Padua
University of Barcelona
Wuhan University
Facultad de Ciencias Fisicas
University of Bologna
University of Genoa
University of Milan
NASU - Institute of Nuclear Research
University of A Coruna
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Autonomous University of Honduras
Los Alamos National Laboratory
Hunan University
University of Cagliari
University of Groningen
Centro Federal de Educação Tecnológica Celso Suckow da Fonseca
University of Bari
Monash University
Central China Normal University
Eötvös Loránd University
Tsinghua University
University College Dublin
South China Normal University
Cracow University of Technology
Rutherford Appleton Laboratory
University of Bonn
University of Perugia
University of Valencia
University of Maryland, College Park
National Centre for Nuclear Research
University of Pisa
Universidad Nacional de Colombia
University of Birmingham
NASU - Kharkov Institute of Physics and Technology
Vrije Universiteit Amsterdam
Lanzhou University
Henan University
University of Bergamo
Ruhr University Bochum
University of Siena
University of Basilicata
Max Planck Institute for Nuclear Physics
University of Alcalá
University of Urbino

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

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 (Formula presented.) 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 sin2θeffℓ 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.

Original language	English
Article number	26
Journal	Journal of High Energy Physics
Volume	2024
Issue number	12
DOIs	https://doi.org/10.1007/JHEP12(2024)026
State	Published - Dec 2024
Externally published	Yes

Keywords

Electroweak Interaction
Hadron-Hadron Scattering

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10.1007/JHEP12(2024)026

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@article{e0c7d7584fb845eba8c6b5a25ce6a3a0,

title = "Measurement of the effective leptonic weak mixing angle",

abstract = "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 (Formula presented.) 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 sin2θeffℓ 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.",

keywords = "Electroweak Interaction, Hadron-Hadron Scattering",

author = "\{The LHCb collaboration\} and R. Aaij 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 F. Alessio and M. Alexander and Z. Aliouche 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 A. Andreianov and P. Andreola and M. Andreotti and D. Andreou and A. Anelli and D. Ao and F. Archilli and M. Argenton and \{Arguedas Cuendis\}, S. and A. Artamonov and M. Artuso and E. Aslanides and \{Ata{\'i}de Da Silva\}, R. and M. Atzeni and B. Audurier and D. Bacher and \{Bachiller Perea\}, I. and S. Bachmann and M. Bachmayer and Back, \{J. J.\} and \{Baladron Rodriguez\}, P. and \{Calderon Ramirez\}, S. and \{Castro Godinez\}, J.",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2024.",

year = "2024",

month = dec,

doi = "10.1007/JHEP12(2024)026",

language = "Ingl{\'e}s",

volume = "2024",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

number = "12",

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TY - JOUR

T1 - Measurement of the effective leptonic weak mixing angle

AU - The LHCb collaboration

AU - Aaij, R.

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 - Alessio, F.

AU - Alexander, M.

AU - Aliouche, Z.

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 - Andreianov, A.

AU - Andreola, P.

AU - Andreotti, M.

AU - Andreou, D.

AU - Anelli, A.

AU - Ao, D.

AU - Archilli, F.

AU - Argenton, M.

AU - Arguedas Cuendis, S.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Ataíde Da Silva, R.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bacher, D.

AU - Bachiller Perea, I.

AU - Bachmann, S.

AU - Bachmayer, M.

AU - Back, J. J.

AU - Baladron Rodriguez, P.

AU - Calderon Ramirez, S.

AU - Castro Godinez, J.

PY - 2024/12

Y1 - 2024/12

N2 - 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 (Formula presented.) 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 sin2θeffℓ 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.

AB - 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 (Formula presented.) 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 sin2θeffℓ 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.

KW - Electroweak Interaction

KW - Hadron-Hadron Scattering

UR - https://www.scopus.com/pages/publications/85211609312

U2 - 10.1007/JHEP12(2024)026

DO - 10.1007/JHEP12(2024)026

M3 - Artículo

AN - SCOPUS:85211609312

SN - 1029-8479

VL - 2024

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 12

M1 - 26

ER -

Measurement of the effective leptonic weak mixing angle

Abstract

Keywords

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