Measurement of the electron reconstruction efficiency at LHCb
Name
Aaij_2019_J._Inst._14_P11023.pdf
Description
Published version
Size
999.98 KB
Format
Unknown
Checksum (MD5)
52147a0582d4d6fb4be89645a2b2f8aa
Author(s)
The LHCb Collaboration
Boettcher, Thomas Julian
Craik, Daniel C
Weisser, Constantin
Williams, Michael
Date Issued
2019
Journal
Journal of Instrumentation
Publisher
IOP Publishing
Version
Final published version
Abstract
© 2019 CERN for the benefit of the LHCb collaboration.. The single electron track-reconstruction efficiency is calibrated using a sample corresponding to 1.3 fb-1 of pp collision data recorded with the LHCb detector in 2017. This measurement exploits B+ J/ψ(e+e-)K+ decays, where one of the electrons is fully reconstructed and paired with the kaon, while the other electron is reconstructed using only the information of the vertex detector. Despite this partial reconstruction, kinematic and geometric constraints allow the B meson mass to be reconstructed and the signal to be well separated from backgrounds. This in turn allows the electron reconstruction efficiency to be measured by matching the partial track segment found in the vertex detector to tracks found by LHCb's regular reconstruction algorithms. The agreement between data and simulation is evaluated, and corrections are derived for simulated electrons in bins of kinematics. These correction factors allow LHCb to measure branching fractions involving single electrons with a systematic uncertainty below 1%.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 3.0 unported license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1088/1748-0221/14/11/P11023
