Measurement of isolated photon production in pp and PbPb collisions at root s(NN)=2.76 TeV with CMS

Abstract

Isolated photon production is measured in pp and PbPb collisions at nucleon-nucleon centre-of-mass energies of 2.76 TeV in the pseudorapidity range vertical bar eta vertical bar < 1.44 and transverse energies E-T between 20 and 80 GeV with the CMS detector at the LHC. The measured E-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-T-differential yields, scaled by the number of incoherent nucleon-nucleon Collisions, is consistent with unity for all PbPb reaction centralities.


Tutti gli autori

  • Pugliese G

Titolo volume/Rivista

NUCLEAR PHYSICS. A


Anno di pubblicazione

2012

ISSN

0375-9474

ISBN

Non Disponibile


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Nessuna citazione

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