Z boson production in p+Pb collisions at sqrt(s_NN)=5.02 TeV measured with the ATLAS detector

The ATLAS Collaboration has measured the inclusive production of Z bosons via their decays into electron and muon pairs in p+Pb collisions at sqrt(sNN)=5.02 TeV at the Large Hadron Collider. The measurements are made using data corresponding to integrated luminosities of 29.4 nb-1 and 28.1 nb-1 for Z?ee and Z?µµ, respectively. The results from the two channels are consistent and combined to obtain a cross section times the Z?ll branching ratio, integrated over the rapidity region |y*Z|<3.5, of 139.8 ± 4.8 (stat.) ± 6.2 (syst.) ± 3.8 (lumi.) nb. Differential cross sections are presented as functions of the Z boson rapidity and transverse momentum, and compared with models based on parton distributions both with and without nuclear corrections. The centrality dependence of Z boson production in p+Pb collisions is measured and analyzed within the framework of a standard Glauber model and the model's extension for fluctuations of the underlying nucleon-nucleon scattering cross section.