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

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.

Submitted to Physics Letters B

References in corpus (20)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• New parton distributions for collider physics
• Glauber Modeling in High Energy Nuclear Collisions
• EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
• Observation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at sqrt(S(NN))= 2.76 TeV with the ATLAS Detector at the LHC
• Observation and studies of jet quenching in PbPb collisions at nucleon-nucleon center-of-mass energy = 2.76 TeV
• A model of jet quenching in ultrarelativistic heavy ion collisions and high-pt hadron spectra at RHIC
• Determination of nuclear parton distribution functions and their uncertainties at next-to-leading order
• Nuclear parton distributions at next to leading order
• Cross section of isolated prompt photons in hadron-hadron collisions
• Centrality Dependence of Direct Photon Production in sqrt(s_NN) = 200 GeV Au+Au Collisions
• Observation of Direct Photons in Central 158 A GeV 208Pb+208Pb Collisions
• Measurement of the centrality dependence of J/ψ yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC
• Study of Z boson production in PbPb collisions at nucleon-nucleon centre of mass energy = 2.76 TeV
• Measurement of the Differential Cross Section for Isolated Prompt Photon Production in pp Collisions at 7 TeV
• Measurement of the Isolated Prompt Photon Production Cross Section in pp Collisions at sqrt(s) = 7 TeV
• Quarks and Gluon Fragmentation Functions into Photons
• Inclusive prompt photon production in nuclear collisions at RHIC and LHC
• Sensitivity of isolated photon production at TeV hadron colliders to the gluon distribution in the proton

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