Measurement of isolated photon production in pp and PbPb collisions at sqrt(sNN) = 2.76 TeV

6 CMS
IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
Abstract : 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 |eta|<1.44 and transverse energies ET between 20 and 80 GeV with the CMS detector at the LHC. The measured ET spectra are found to be in good agreement with next-to-leading-order perturbative QCD predictions. The ratio of PbPb to pp isolated photon ET-differential yields, scaled by the number of incoherent nucleon-nucleon collisions, is consistent with unity for all PbPb reaction centralities.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00660551
Contributor : Sylvie Flores <>
Submitted on : Tuesday, January 17, 2012 - 8:54:43 AM
Last modification on : Monday, June 28, 2021 - 3:56:02 PM

Citation

S. Chatrchyan, D. Sillou, M. Besancon, S. Choudhury, M. Dejardin, et al.. Measurement of isolated photon production in pp and PbPb collisions at sqrt(sNN) = 2.76 TeV. Physics Letters B, Elsevier, 2012, 710, pp.256-277. ⟨10.1016/j.physletb.2012.02.077⟩. ⟨in2p3-00660551⟩

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