Performance of photon reconstruction and identification with the CMS detector in proton-proton collisions at √s = 8 TeV
Abstract
A description is provided of the performance of the CMS detector for photon reconstruction and identification in proton-proton collisions at a centre-of-mass energy of 8 TeV at the CERN LHC. Details are given on the reconstruction of photons from energy deposits in the electromagnetic calorimeter (ECAL) and the extraction of photon energy estimates. Furthermore, the reconstruction of electron tracks from photons that convert to electrons in the CMS tracker is also described, as is the optimization of the photon energy reconstruction and its accurate modelling in simulation, in the analysis of the Higgs boson decay into two photons. In the barrel section of the ECAL, an energy resolution of about 1% is achieved for unconverted or late-converting photons from H → γγ decays. Furthermore, different photon identification methods are discussed and their corresponding selection efficiencies in data are compared with those found in simulated events.
- Authors:
-
- Yerevan Physics Inst. (YerPhI), Yerevan (Armenia). et al.
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- CMS Collaboration
- OSTI Identifier:
- 1221259
- Report Number(s):
- FERMILAB-PUB-15-069-CMS; CERN-PH-EP-2015-006; CMS-EGM-14-001
Journal ID: ISSN 1748-0221; arXiv eprint number arXiv:1502.02702
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Instrumentation
- Additional Journal Information:
- Journal Volume: 10; Journal ID: ISSN 1748-0221
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; pattern recognition; cluster finding; calibration and fitting methods; performance of high energy physics detectors
Citation Formats
Khachatryan, Vardan. Performance of photon reconstruction and identification with the CMS detector in proton-proton collisions at √s = 8 TeV. United States: N. p., 2015.
Web. doi:10.1088/1748-0221/10/08/P08010.
Khachatryan, Vardan. Performance of photon reconstruction and identification with the CMS detector in proton-proton collisions at √s = 8 TeV. United States. https://doi.org/10.1088/1748-0221/10/08/P08010
Khachatryan, Vardan. Mon .
"Performance of photon reconstruction and identification with the CMS detector in proton-proton collisions at √s = 8 TeV". United States. https://doi.org/10.1088/1748-0221/10/08/P08010. https://www.osti.gov/servlets/purl/1221259.
@article{osti_1221259,
title = {Performance of photon reconstruction and identification with the CMS detector in proton-proton collisions at √s = 8 TeV},
author = {Khachatryan, Vardan},
abstractNote = {A description is provided of the performance of the CMS detector for photon reconstruction and identification in proton-proton collisions at a centre-of-mass energy of 8 TeV at the CERN LHC. Details are given on the reconstruction of photons from energy deposits in the electromagnetic calorimeter (ECAL) and the extraction of photon energy estimates. Furthermore, the reconstruction of electron tracks from photons that convert to electrons in the CMS tracker is also described, as is the optimization of the photon energy reconstruction and its accurate modelling in simulation, in the analysis of the Higgs boson decay into two photons. In the barrel section of the ECAL, an energy resolution of about 1% is achieved for unconverted or late-converting photons from H → γγ decays. Furthermore, different photon identification methods are discussed and their corresponding selection efficiencies in data are compared with those found in simulated events.},
doi = {10.1088/1748-0221/10/08/P08010},
journal = {Journal of Instrumentation},
number = ,
volume = 10,
place = {United States},
year = {Mon Aug 10 00:00:00 EDT 2015},
month = {Mon Aug 10 00:00:00 EDT 2015}
}
Web of Science
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Search for an excited lepton that decays via a contact interaction to a lepton and two jets in proton-proton collisions at $\sqrt{s} =$ 13 TeV
text, January 2020
- Sirunyan, Albert M.; Tumasyan, Armen; Adam, Wolfgang
- RWTH Aachen University
Calibration of the CMS hadron calorimeters using proton-proton collision data at $\sqrt{s} =$ 13 TeV
text, January 2019
- Sirunyan, Albert M.; Tumasyan, Armen; Adam, Wolfgang
- RWTH Aachen University
Search for supersymmetry in proton-proton collisions at 13 TeV in final states with jets and missing transverse momentum
text, January 2019
- Sirunyan, Albert M.; Tumasyan, Armen; Adam, Wolfgang
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Measurement of the cross section for electroweak production of a Z boson, a photon and two jets in proton-proton collisions at $\sqrt{s} =$ 13 TeV and constraints on anomalous quartic couplings
text, January 2020
- Sirunyan, Albert M.; Tumasyan, Armen; Adam, Wolfgang
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Search for supersymmetry using Higgs boson to diphoton decays at √s = 13 TeV
text, January 2019
- Collaboration, The CMS; Sirunyan, Albert M.; Backhaus, Malte
- ETH Zurich
Identification of heavy, energetic, hadronically decaying particles using machine-learning techniques
text, January 2020
- Collaboration, Cms; Sirunyan, Albert M.; Tumasyan, Armen R.
- ETH Zurich
Measurement of differential cross sections for inclusive isolated-photon and photon+jet production in proton-proton collisions at $\sqrt{s} = 13\,\text {TeV} $
text, January 2019
- Sirunyan, A. M.; Tumasyan, A.; Adam, W.
- Karlsruhe
Measurement of differential cross sections for inclusive isolated-photon and photon+jets production in proton-proton collisions at $\sqrt{s} =$ 13 TeV
text, January 2019
- Sirunyan, Albert M.; Tumasyan, Armen; Adam, Wolfgang
- RWTH Aachen University
Particle-flow reconstruction and global event description with the CMS detector
text, January 2017
- Sirunyan, Albert M.; Tumasyan, Armen; Adam, Wolfgang
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Search for supersymmetry in final states with photons and missing transverse momentum in proton-proton collisions at 13 TeV
text, January 2019
- Sirunyan, A. M.; Tumasyan, A.; Adam, W.
- Karlsruhe
Calibration of the CMS hadron calorimeters using proton-proton collision data at √s = 13 TeV
text, January 2020
- Sirunyan, A. M.; Tumasyan, A.; Adam, W.
- Karlsruhe
Search for associated production of a Higgs boson and a single top quark in proton-proton collisions at $\sqrt{s} =$ TeV
text, January 2019
- Sirunyan, Albert M.; Tumasyan, Armen; Adam, Wolfgang
- RWTH Aachen University
Search for supersymmetry using Higgs boson to diphoton decays at √s = 13 TeV
text, January 2019
- Sirunyan, A. M.; Tumasyan, A.; Adam, W.
- RWTH Aachen University
A search for the standard model Higgs boson decaying to charm quarks
text, January 2019
- Sirunyan, Albert M.; Tumasyan, Armen; Adam, Wolfgang
- RWTH Aachen University
Measurement of the cross section for electroweak production of a Z boson, a photon and two jets in proton-proton collisions at $\sqrt{s} =$ 13 TeV and constraints on anomalous quartic couplings
text, January 2020
- Sirunyan, Albert M.; Tumasyan, Armen; Adam, Wolfgang
- RWTH Aachen University
Observation of medium induced modifications of jet fragmentation in PbPb collisions using isolated-photon-tagged jets
text, January 2018
- Sirunyan, Albert M.; Tumasyan, Armen; Adam, Wolfgang
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Singlet-Catalyzed Electroweak Phase Transitions in the 100 TeV Frontier
text, January 2016
- Kotwal, Ashutosh V.; Ramsey-Musolf, Michael J.; No, Jose Miguel
- arXiv
Search for supersymmetry in final states with photons and missing transverse momentum in proton-proton collisions at 13 TeV
text, January 2019
- Collaboration, Cms
- arXiv
Search for physics beyond the standard model in events with overlapping photons and jets
text, January 2019
- Collaboration, Cms
- arXiv
Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at $\sqrt{s} =$ 13 TeV
text, January 2019
- Collaboration, Cms
- arXiv
Search for supersymmetry in proton-proton collisions at 13 TeV in final states with jets and missing transverse momentum
text, January 2019
- Collaboration, Cms
- arXiv
Particle-flow reconstruction and global event description with the CMS detector
text, January 2017
- Collaboration, Cms; Canelli, Maria Florencia; Kilminster, Benjamin
- IOP Publishing