Journal article
Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at √s = 8 TeV
Journal of instrumentation : an IOP and SISSA journal, Vol.10, P06005
06/10/2015
DOI: 10.1088/1748-0221/10/06/P06005
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, Υ, 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.
Details
- Title: Subtitle
- Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at √s = 8 TeV
- Creators
- CMS Collaboration (Institution)
- Contributors
- B. Bilki (Contributor) - University of IowaW Clarida (Contributor) - University of IowaKamuran Dilsiz (Contributor) - University of Iowa, Physics and AstronomyM. Haytmyradov (Contributor) - University of IowaJ-P Merlo (Contributor) - University of IowaH Mermerkaya (Contributor) - University of IowaAlexi Mestvirishvili (Contributor) - University of Iowa, Physics and AstronomyA. Moeller (Contributor) - University of IowaJane M Nachtman (Contributor) - University of Iowa, Physics and AstronomyHasan Ogul (Contributor) - University of Iowa, Physics and AstronomyYasar Onel (Contributor) - University of Iowa, Physics and AstronomyF. Ozok (Contributor) - University of IowaAldo Penzo (Contributor) - University of Iowa, Physics and AstronomyR Rahmat (Contributor) - University of IowaS. Sen (Contributor) - University of IowaP Tan (Contributor) - University of IowaE. Tiras (Contributor) - University of IowaJames W Wetzel (Contributor) - University of Iowa, Physics and AstronomyKai Yi (Contributor) - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- Journal of instrumentation : an IOP and SISSA journal, Vol.10, P06005
- DOI
- 10.1088/1748-0221/10/06/P06005
- ISSN
- 1748-0221
- Publisher
- IOP
- Language
- English
- Date published
- 06/10/2015
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984439157002771
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