Measurement of the isolated prompt photon production cross section in pp collisions at √s=7 TeV

Phys Rev Lett. 2011 Feb 25;106(8):082001. doi: 10.1103/PhysRevLett.106.082001. Epub 2011 Feb 23.


The differential cross section for the inclusive production of isolated prompt photons has been measured as a function of the photon transverse energy E(T)(γ) in pp collisions at √s=7 TeV using data recorded by the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 2.9 pb(-1). Photons are required to have a pseudorapidity |η(γ)|<1.45 and E(T)(γ)>21 GeV, covering the kinematic region 0.006<x(T)<0.086. The measured cross section is found to be in agreement with next-to-leading-order perturbative QCD calculations.