Measurement of the triple-differential cross section for photon + jets production in proton-proton collisions at √s = 7 TeV

Abstract

A measurement of the triple-differential cross section, \({{{{{\mathrm{d}}^3}\sigma }} \left/ {{\left( {\mathrm{d}\mathrm{p}_T^{\gamma}\mathrm{d}{\eta^{\gamma }}\mathrm{d}{\eta^{\mathrm{jet}}}} \right)}} \right.}\), in photon + jets final states using a data sample from proton-proton collisions at \(\sqrt{s}\) = 7 TeV is presented. This sample corresponds to an integrated luminosity of 2.14 fb⁻¹ collected by the CMS detector at the LHC. Photons and jets are reconstructed within a pseudorapidity range of | η | < 2.5, and are required to have transverse momenta in the range 40 < \(p_{\mathrm{T}}^{\mathrm{jet}}\) < 300 GeV and \(p_{\mathrm{T}}^{\mathrm{jet}} \) > 30 GeV, respectively. The measurements are compared to theoretical predictions from the sherpa leading-order QCD Monte Carlo event generator and the next-to-leading-order perturbative QCD calculation from jetphox. The predictions are found to be consistent with the data over most of the examined kinematic region.