Several theories beyond the Standard Model predict the existence of new heavy
neutral bosons. Such particles could be produced in significant amounts at the
LHC and their decay into a dilepton pair provides a clean signature with low
background contamination. The results of the analysis of the whole 2012 dataset
collected by the CMS experiment at a center of mass energy of 8 TeV are
presented. No evidence for new physics is seen and upper limits on the cross
section production of such particles are extracted. These results can be turned
into lower limits on the mass of the heavy bosons, reaching values well above 2
TeV/c2 for many models.Comment: 4 pages, 9 figures, talk proceedings at Rencontres de Moriond 2013
(EWK Session