Measurement of the W, Z and photon production in lead–lead collisions at image with the ATLAS detector

The ATLAS experiment measures yields of isolated photons and of Z and W bosons via leptonic decay modes in Pb+Pb collisions at image. The data samples used in the analysis were obtained in the year 2010 and year 2011 LHC runs and correspond to image and image of integrated luminosity respectively. The measured yields of all bosons are consistent with the scaling proportional to the number of nucleon-nucleon collisions. The transverse momentum distributions are measured for isolated photons and for Z bosons for different centrality bins. The shapes of measured distributions do not change with centrality. The transverse momentum and rapidity distributions of Z bosons are consistent in shape with Pythia model.