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.
|Titolo:||Measurement of isolated photon production in pp and PbPb collisions at root s(NN)=2.76 TeV with CMS|
|Data di pubblicazione:||2012|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.nuclphysa.2012.12.053|
|Appare nelle tipologie:||1.1 Articolo in rivista|