Prompt photon measurements with the ATLAS detector

In this paper a general overview of the main prompt photon measurements with the ATLAS detector is presented. The production cross section for inclusive photon, photon plus jet and diphoton have been measured with 37 pb−1 of data collected by the ATLAS detector in 2010. Data have been compared with next-to-leading order perturbative QCD calculations and found to be in fair agreement. The overall picture confirms that QCD photons are well understood in ATLAS laying solid foundations for discovery physics involving photons.