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.
Measurement of isolated photon production in pp and PbPb collisions at root s(NN)=2.76 TeV with CMS / Lee, Yen-Jie; Pugliese, Gabriella Maria Incoronata; Cms, Collaboration. - In: NUCLEAR PHYSICS. A. - ISSN 0375-9474. - STAMPA. - 910:(2012), pp. 376-378. [10.1016/j.nuclphysa.2012.12.053]
Measurement of isolated photon production in pp and PbPb collisions at root s(NN)=2.76 TeV with CMS
Pugliese, Gabriella Maria Incoronata;
2012-01-01
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
