Curvature-bias corrections using a pseudomass method

The LHCb collaboration

doi:10.1088/1748-0221/19/03/P03010

Curvature-bias corrections using a pseudomass method

The LHCb collaboration

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

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

1 Scopus citations

Abstract

Momentum measurements for very high momentum charged particles, such as muons from electroweak vector boson decays, are particularly susceptible to charge-dependent curvature biases that arise from misalignments of tracking detectors. Low momentum charged particles used in alignment procedures have limited sensitivity to coherent displacements of such detectors, and therefore are unable to fully constrain these misalignments to the precision necessary for studies of electroweak physics. Additional approaches are therefore required to understand and correct for these effects. In this paper the curvature biases present at the LHCb detector are studied using the pseudomass method in proton-proton collision data recorded at centre of mass energy √s = 13 TeV during 2016, 2017 and 2018. The biases are determined using Z → μ⁺μ^- decays in intervals defined by the data-taking period, magnet polarity and muon direction. Correcting for these biases, which are typically at the 10^-4 GeV^-1 level, improves the Z → μ⁺μ^- mass resolution by roughly 18% and eliminates several pathological trends in the kinematic-dependence of the mean dimuon invariant mass.

Original language	English
Article number	P03010
Journal	Journal of Instrumentation
Volume	19
Issue number	3
DOIs	https://doi.org/10.1088/1748-0221/19/03/P03010
State	Published - 1 Mar 2024
Externally published	Yes

Keywords

Analysis and statistical methods
Detector alignment and calibration methods (lasers, sources, particle-beams)
Large detector-systems performance
Performance of High Energy Physics Detectors

Access to Document

10.1088/1748-0221/19/03/P03010

Cite this

@article{69806a865db94d8da8b67de9dba6667e,

title = "Curvature-bias corrections using a pseudomass method",

abstract = "Momentum measurements for very high momentum charged particles, such as muons from electroweak vector boson decays, are particularly susceptible to charge-dependent curvature biases that arise from misalignments of tracking detectors. Low momentum charged particles used in alignment procedures have limited sensitivity to coherent displacements of such detectors, and therefore are unable to fully constrain these misalignments to the precision necessary for studies of electroweak physics. Additional approaches are therefore required to understand and correct for these effects. In this paper the curvature biases present at the LHCb detector are studied using the pseudomass method in proton-proton collision data recorded at centre of mass energy √s = 13 TeV during 2016, 2017 and 2018. The biases are determined using Z → μ+μ- decays in intervals defined by the data-taking period, magnet polarity and muon direction. Correcting for these biases, which are typically at the 10-4 GeV-1 level, improves the Z → μ+μ- mass resolution by roughly 18\% and eliminates several pathological trends in the kinematic-dependence of the mean dimuon invariant mass.",

keywords = "Analysis and statistical methods, Detector alignment and calibration methods (lasers, sources, particle-beams), Large detector-systems performance, Performance of High Energy Physics Detectors",

author = "\{The LHCb collaboration\} and R. Aaij and Abdelmotteleb, \{A. S.W.\} and \{Abellan Beteta\}, C. and F. Abudinen and T. Ackernley 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 \{Alfonso Albero\}, A. 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 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 V. Balagura and W. Baldini and \{Castro Godinez\}, J.",

note = "Publisher Copyright: {\textcopyright} 2024 CERN.",

year = "2024",

month = mar,

day = "1",

doi = "10.1088/1748-0221/19/03/P03010",

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

volume = "19",

journal = "Journal of Instrumentation",

issn = "1748-0221",

number = "3",

}

TY - JOUR

T1 - Curvature-bias corrections using a pseudomass method

AU - The LHCb collaboration

AU - Aaij, R.

AU - Abdelmotteleb, A. S.W.

AU - Abellan Beteta, C.

AU - Abudinen, F.

AU - Ackernley, T.

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 - Alfonso Albero, A.

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 - 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 - Balagura, V.

AU - Baldini, W.

AU - Castro Godinez, J.

PY - 2024/3/1

Y1 - 2024/3/1

N2 - Momentum measurements for very high momentum charged particles, such as muons from electroweak vector boson decays, are particularly susceptible to charge-dependent curvature biases that arise from misalignments of tracking detectors. Low momentum charged particles used in alignment procedures have limited sensitivity to coherent displacements of such detectors, and therefore are unable to fully constrain these misalignments to the precision necessary for studies of electroweak physics. Additional approaches are therefore required to understand and correct for these effects. In this paper the curvature biases present at the LHCb detector are studied using the pseudomass method in proton-proton collision data recorded at centre of mass energy √s = 13 TeV during 2016, 2017 and 2018. The biases are determined using Z → μ+μ- decays in intervals defined by the data-taking period, magnet polarity and muon direction. Correcting for these biases, which are typically at the 10-4 GeV-1 level, improves the Z → μ+μ- mass resolution by roughly 18% and eliminates several pathological trends in the kinematic-dependence of the mean dimuon invariant mass.

AB - Momentum measurements for very high momentum charged particles, such as muons from electroweak vector boson decays, are particularly susceptible to charge-dependent curvature biases that arise from misalignments of tracking detectors. Low momentum charged particles used in alignment procedures have limited sensitivity to coherent displacements of such detectors, and therefore are unable to fully constrain these misalignments to the precision necessary for studies of electroweak physics. Additional approaches are therefore required to understand and correct for these effects. In this paper the curvature biases present at the LHCb detector are studied using the pseudomass method in proton-proton collision data recorded at centre of mass energy √s = 13 TeV during 2016, 2017 and 2018. The biases are determined using Z → μ+μ- decays in intervals defined by the data-taking period, magnet polarity and muon direction. Correcting for these biases, which are typically at the 10-4 GeV-1 level, improves the Z → μ+μ- mass resolution by roughly 18% and eliminates several pathological trends in the kinematic-dependence of the mean dimuon invariant mass.

KW - Analysis and statistical methods

KW - Detector alignment and calibration methods (lasers, sources, particle-beams)

KW - Large detector-systems performance

KW - Performance of High Energy Physics Detectors

UR - https://www.scopus.com/pages/publications/85187949016

U2 - 10.1088/1748-0221/19/03/P03010

DO - 10.1088/1748-0221/19/03/P03010

M3 - Artículo

AN - SCOPUS:85187949016

SN - 1748-0221

VL - 19

JO - Journal of Instrumentation

JF - Journal of Instrumentation

IS - 3

M1 - P03010

ER -

Curvature-bias corrections using a pseudomass method

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this