Measurement of the differential cross section for isolated prompt photon production in pp collisions at 7 TeV
Author(s)
Bendavid, Joshua L.; Busza, Wit; Butz, Erik M.; Cali, Ivan Amos; Chan, M.; Dutta, Valentina; Everaerts, Pieter Bruno Bart; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hahn, Kristian Allan; Kim, Y.; Klute, Markus; Li, W.; Ma, Teng; Nahn, Steven; Paus, Christoph M. E.; Ralph, Duncan Kelley; Stephans, George S. F.; Velicanu, Dragos Alexandru; Yilmaz, Yetkin; Zanetti, Marco; Wenger, Edward Allen; Bauer, Gerry P; Lee, Yen-Jie; Loizides, Constantinos; Roland, Christof E; Rudolph, Matthew Scott; Stoeckli, Fabian; Sung, Kevin Kai Hong; Wolf, Roger; Yang, Mingming; Yoon, A. S.; Harris, Philip Coleman; Luckey Jr, P David; Roland, Gunther M; Sumorok, Konstanty C; Xie, Si; ... Show more Show less
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A measurement of the differential cross section for the inclusive production of isolated prompt photons in proton-proton collisions at a center-of-mass energy of 7 TeV is presented. The data sample corresponds to an integrated luminosity of 36 pb[superscript -1] recorded by the CMS detector at the LHC. The measurement covers the pseudorapidity range |η|<2.5 and the transverse energy range 25<E[subscript T]<400 GeV, corresponding to the kinematic region 0.007<x[subscript T]<0.114. Photon candidates are identified with two complementary methods, one based on photon conversions in the silicon tracker and the other on isolated energy deposits in the electromagnetic calorimeter. The measured cross section is presented as a function of E[subscript T] in four pseudorapidity regions. The next-to-leading-order perturbative QCD calculations are consistent with the measured cross section.
Date issued
2011-09Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical Review D
Publisher
American Physical Society
Citation
Chatrchyan, S. et al. “Measurement of the Differential Cross Section for Isolated Prompt Photon Production in Pp Collisions at 7 TeV.” Physical Review D 84.5 (2011). © 2011 CERN, for the CMS Collaboration
Version: Final published version
ISSN
1550-7998
1089-4918