Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at √s = 8 TeV
Name
_2015_J._Inst._10_P06005.pdf
Description
Published version
Size
1.79 MB
Format
Adobe PDF
Checksum (MD5)
1f4bf9d80b430906a3acd3502f9d6059
Author(s)
The CMS Collaboration
Date Issued
June 1, 2015
Journal
Journal of Instrumentation
Publisher
IOP Publishing
Version
Final published version
Abstract
© CERN 2015 for the benefit of the CMS collaboration.. The performance and strategies used in electron reconstruction and selection at CMS are presented based on data corresponding to an integrated luminosity of 19.7 fb-1, collected in proton-proton collisions at √s = 8 TeV at the CERN LHC. The paper focuses on prompt isolated electrons with transverse momenta ranging from about 5 to a few 100 GeV. A detailed description is given of the algorithms used to cluster energy in the electromagnetic calorimeter and to reconstruct electron trajectories in the tracker. The electron momentum is estimated by combining the energy measurement in the calorimeter with the momentum measurement in the tracker. Benchmark selection criteria are presented, and their performances assessed using Z, , and J/ψ decays into e+ + e- pairs. The spectra of the observables relevant to electron reconstruction and selection as well as their global efficiencies are well reproduced by Monte Carlo simulations. The momentum scale is calibrated with an uncertainty smaller than 0.3%. The momentum resolution for electrons produced in Z boson decays ranges from 1.7 to 4.5%, depending on electron pseudorapidity and energy loss through bremsstrahlung in the detector material.
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/10.1088/1748-0221/10/06/P06005
