Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at √s = 8 TeV

The CMS collaboration

Research output: Contribution to journalArticle

189 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article numberP06005
JournalJournal of Instrumentation
Volume10
Issue number6
DOIs
Publication statusPublished - 1 Jun 2015

Fingerprint

Protons
Collision
Detector
Electron
Detectors
collisions
Momentum
protons
Electrons
detectors
momentum
electrons
Calorimeter
calorimeters
Calorimeters
Energy
Decay
electron trajectories
Electric power measurement
decay

Keywords

  • calibration and fitting methods
  • cluster finding
  • Pattern recognition
  • Performance of High Energy Physics Detectors

ASJC Scopus subject areas

  • Instrumentation
  • Mathematical Physics

Cite this

Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at √s = 8 TeV. / The CMS collaboration.

In: Journal of Instrumentation, Vol. 10, No. 6, P06005, 01.06.2015.

Research output: Contribution to journalArticle

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abstract = "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.",
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KW - cluster finding

KW - Pattern recognition

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