Shedding light on QCD: photon (+jet) production at the LHC with the ATLAS detector

by Dr Claudia Glasman (Universidad Autonoma de Madrid)

Tuesday 11 Feb 2014, 17:00 → 18:00 Europe/Berlin

Auditorium (MPI fuer Physik)

The measurements of prompt photon production in pp collisions at ATLAS are reviewed. Prompt photons provide a direct probe of the short-distance interactions, largely unaffected by non-perturbative hadronisation effects, complementary to that provided by measurements of jets or vector bosons. The measurements are sensitive to the gluon density of the proton and provide tests of the dynamics of QCD. Inclusive prompt-photon cross sections have been measured over a wide range of transverse momenta; the diphoton cross section has also been measured as a function of diphoton mass, total transverse momentum and azimuthal separation. Production of photons in association with jets is also presented. The results are compared to the predictions of next-to-leading-order QCD.