Z boson production with the 2011 data in PbPb collisions

This document presents the measurement of $Z$ bosons in the di-muon channel in Pb-Pb collisions at $\sqrt{s_{NN}} = 2.76$~TeV made by the CMS experiment at the LHC. The analysis is based on a data sample collected during the PbPb run in 2011, which corresponds to an integrated luminosity of 150~$\mu$b$^{-1}$. The $Z$ boson yield is investigated as a function of its rapidity and transverse momentum, as well as collision centrality. The results are compared to and agree with next-to-leading order theoretical predictions, scaled by the number of binary collisions.