W, Z and photon production in CMS

Abstract

The production of electroweak bosons (photons, W and Z particles) in PbPb and pp collisions at sqrt(s) = 2.76 TeV per interacting nucleon pair has been measured with the CMS detector at the LHC. Direct photon production is studied using samples of isolated photons. W and Z bosons are reconstructed through their leptonic decay into muons. Their production rate in PbPb data is studied as a function of the centrality of the collision and compared to that in pp interactions, once normalized by the number of binary nucleon-nucleon interactions. The results are also compared to next-to-leading-order perturbative QCD calculations.

Proceedings from Plenary Talk at 5th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions (Hard Probes 2012) at Cagliari (Italia)

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• Novel Phenomenology of Parton Distributions from the Drell-Yan Process
• An estimate for the thermal photon rate from lattice QCD
• Next-to-leading order thermal photon production in a weakly-coupled plasma