Measurement of the inclusive isolated prompt photon cross-section in pp collisions at root s=7 TeV using 35 pb^(-1) of ATLAS data
2011
Abstrakt
A measurement of the differential cross-section for the inclusive production of isolated prompt photons in pp collisions at a center-of-mass energy root s=7 TeV is presented. The results are based on an integrated luminosity of 35 pb^(-1), collected with the ATLAS detector at the LHC.
The yields of the signal photons are measured using a data-driven technique, based on the observed distribution of the hadronic energy in a narrow cone around the photon candidate and the photon selection criteria. The results are compared with next-to-leading order perturbative QCD calculations and found to be in good agreement over four orders of magnitude in cross-section.