Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run-1 data
Result description
The algorithms used by the ATLAS Collaboration to reconstruct and identify prompt photons are described. Measurements of the photon identification efficiencies are reported, using 4.9 fb−1 of pp collision data collected at the LHC at √s=7 TeV and 20.3 fb−1 at √s=8 TeV . The efficiencies are measured separately for converted and unconverted photons, in four different pseudorapidity regions, for transverse momenta between 10 GeV and 1.5 TeV . The results from the combination of three data-driven techniques are compared to the predictions from a simulation of the detector response, after correcting the electromagnetic shower momenta in the simulation for the average differences observed with respect to data. Data-to-simulation efficiency ratios used as correction factors in physics measurements are determined to account for the small residual efficiency differences.
Keywords
ATLASCERN LHC Collphoton: rapiditynumerical calculations: Monte Carlo7000 GeV-cmsexperimental results8000 GeV-cms
The result's identifiers
Result code in IS VaVaI
Alternative codes found
RIV/68407700:21220/16:00305595 RIV/68407700:21340/16:00305595 RIV/68407700:21670/16:00305595 RIV/00216208:11320/16:10335914 RIV/61989592:15310/16:33161594
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run-1 data
Original language description
The algorithms used by the ATLAS Collaboration to reconstruct and identify prompt photons are described. Measurements of the photon identification efficiencies are reported, using 4.9 fb−1 of pp collision data collected at the LHC at √s=7 TeV and 20.3 fb−1 at √s=8 TeV . The efficiencies are measured separately for converted and unconverted photons, in four different pseudorapidity regions, for transverse momenta between 10 GeV and 1.5 TeV . The results from the combination of three data-driven techniques are compared to the predictions from a simulation of the detector response, after correcting the electromagnetic shower momenta in the simulation for the average differences observed with respect to data. Data-to-simulation efficiency ratios used as correction factors in physics measurements are determined to account for the small residual efficiency differences.
Czech name
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Czech description
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Classification
Type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
European Physical Journal C
ISSN
1434-6044
e-ISSN
—
Volume of the periodical
76
Issue of the periodical within the volume
12
Country of publishing house
US - UNITED STATES
Number of pages
42
Pages from-to
1-42
UT code for WoS article
000389890600001
EID of the result in the Scopus database
2-s2.0-85003480972
Basic information
Result type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
OECD FORD
Particles and field physics
Year of implementation
2016