CMS Collaboration2015-08-212015-08-212013CMS Collaboration. "Search for Z′ resonances decaying to tt¯ in dilepton+jets final states in pp collisions at √s=7  TeV." <i>Physical Review D,</i> 87, no. 7 (2013) American Physical Society: 72002. http://dx.doi.org/10.1103/PhysRevD.87.072002.https://hdl.handle.net/1911/81445A search for resonances decaying to top quark-antiquark pairs is performed using a dilepton+jets data sample recorded by the CMS experiment at the LHC in pp collisions at √s=7  TeV corresponding to an integrated luminosity of 5.0  fb−1. No significant deviations from the standard model background are observed. Upper limits are presented for the production cross section times branching fraction of top quark-antiquark resonances for masses from 750 to 3000 GeV. In particular, the existence of a leptophobic topcolor particle Z′ is excluded at the 95% confidence level for resonance masses MZ′<1.3  TeV for ΓZ′=0.012MZ′, and M<1.9  TeV for ΓZ′=0.10MZ′.engThis is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.Journal articlehttp://dx.doi.org/10.1103/PhysRevD.87.072002