Curvature-bias corrections using a pseudomass method
(2024) In Journal of Instrumentation 19(3).- 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... (More)
- 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. © 2024 CERN. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/dc785139-1c77-4309-a92d-616df3aee729
- author
- Aaij, R. ; Ruiz-Vidal, Joan LU and Zunica, G.
- author collaboration
- organization
- publishing date
- 2024
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Analysis and statistical methods, Detector alignment and calibration methods (lasers, sources, particle-beams), Large detector-systems performance, Performance of High Energy Physics Detectors, Alignment, Magnetic polarity, Tellurium compounds, Alignment methods, Analyse and statistical method, Calibration method, Detector alignment and calibration method (laser, source, particle-beam), Detector systems, High energy physics detector, Large detector-system performance, Large detectors, Laser sources, Performance, Performance of high energy physic detector, Source particles, Systems performance, Charged particles
- in
- Journal of Instrumentation
- volume
- 19
- issue
- 3
- article number
- P03010
- publisher
- IOP Publishing
- external identifiers
-
- scopus:85187949016
- ISSN
- 1748-0221
- DOI
- 10.1088/1748-0221/19/03/P03010
- language
- English
- LU publication?
- yes
- id
- dc785139-1c77-4309-a92d-616df3aee729
- date added to LUP
- 2024-04-08 09:13:23
- date last changed
- 2024-04-08 09:14:29
@article{dc785139-1c77-4309-a92d-616df3aee729,
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. © 2024 CERN.}},
author = {{Aaij, R. and Ruiz-Vidal, Joan and Zunica, G.}},
issn = {{1748-0221}},
keywords = {{Analysis and statistical methods; Detector alignment and calibration methods (lasers, sources, particle-beams); Large detector-systems performance; Performance of High Energy Physics Detectors; Alignment; Magnetic polarity; Tellurium compounds; Alignment methods; Analyse and statistical method; Calibration method; Detector alignment and calibration method (laser, source, particle-beam); Detector systems; High energy physics detector; Large detector-system performance; Large detectors; Laser sources; Performance; Performance of high energy physic detector; Source particles; Systems performance; Charged particles}},
language = {{eng}},
number = {{3}},
publisher = {{IOP Publishing}},
series = {{Journal of Instrumentation}},
title = {{Curvature-bias corrections using a pseudomass method}},
url = {{http://dx.doi.org/10.1088/1748-0221/19/03/P03010}},
doi = {{10.1088/1748-0221/19/03/P03010}},
volume = {{19}},
year = {{2024}},
}