Measurement of isolated photon production in pp and PbPb collisions at √s[subscript NN] = 2.76 TeV
Author(s)
Bendavid, Joshua L.; Busza, Wit; Butz, Erik M.; Cali, Ivan Amos; Chan, M.; 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; Rudolph, Matthew Scott; Stephans, George S. F.; Sung, Kevin Kai Hong; Velicanu, Dragos Alexandru; Wenger, Edward Allen; Wyslouch, Boleslaw; Yilmaz, Yetkin; Yoon, A. S.; Zanetti, Marco; Alver, Burak Han; Lee, Yen-Jie; Luckey Jr, P David; Roland, Gunther M; Sumorok, Konstanty C; Wolf, Roger; Xie, Si; Bauer, Gerry P; Dutta, Valentina; Harris, Philip Coleman; Roland, Christof E; Stoeckli, Fabian; Yang, Mingming; ... Show more Show less
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Isolated photon production is measured in proton–proton and lead–lead collisions at nucleon–nucleon centre-of-mass energies of 2.76 TeV in the pseudorapidity range |η|<1.44 and transverse energies E[subscript T] between 20 and 80 GeV with the CMS detector at the LHC. The measured E[subscript T] spectra are found to be in good agreement with next-to-leading-order perturbative QCD predictions. The ratio of PbPb to pp isolated photon E[subscript T]-differential yields, scaled by the number of incoherent nucleon–nucleon collisions, is consistent with unity for all PbPb reaction centralities.
Date issued
2012-03Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science; Massachusetts Institute of Technology. School of ScienceJournal
Physics Letters B
Publisher
Elsevier
Citation
Chatrchyan, S., V. Khachatryan, A.M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, et al. “Measurement of Isolated Photon Production in Pp and PbPb Collisions at √s[subscript NN] = 2.76 TeV.” Physics Letters B 710, no. 2 (April 2012): 256–277. © 2012 CERN
Version: Final published version
ISSN
03702693