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Measurement of the production cross section for pairs of isolated photons in pp collisions at √s = 7 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; Stephans, George S. F.; Sung, Kevin Kai Hong; Velicanu, Dragos Alexandru; Wenger, Edward Allen; Wyslouch, Boleslaw; Yilmaz, Yetkin; Zanetti, Marco; Lee, Yen-Jie; Luckey Jr, P David; Roland, Gunther M; Sumorok, Konstanty C; Wolf, Roger; Xie, Si; Alver, Burak Han; Harris, Philip Coleman; Roland, Christof E; Rudolph, Matthew Scott; Stoeckli, Fabian; Yang, Mingming; Yoon, A. S.; Bauer, Gerry P; Dutta, Valentina; ... Show more Show less
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Abstract
The integrated and differential cross sections for the production of pairs of isolated photons is measured in proton-proton collisions at a centre-of-mass energy of 7 TeV with the CMS detector at the LHC. A data sample corresponding to an integrated luminosity of 36 pb[superscript −1] is analysed. A next-to-leading-order perturbative QCD calculation is compared to the measurements. A discrepancy is observed for regions of the phase space where the two photons have an azimuthal angle difference Δφ ≲ 2.8 rad.
Date issued
2012-01
URI
http://hdl.handle.net/1721.1/86195
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science; Massachusetts Institute of Technology. School of Science
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Chatrchyan, S., V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, et al. “Measurement of the Production Cross Section for Pairs of Isolated Photons in Pp Collisions at √s = 7 TeV.” J. High Energ. Phys. 2012, no. 1 (January 2012). © CERN, for the benefit of the CMS Collaboration
Version: Final published version
ISSN
1029-8479
1126-6708

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