Search for Z′ resonances decaying to tt? in dilepton+jets final states in pp collisions at √s=7 TeV
Journal
Physical Review D - Particles, Fields, Gravitation and Cosmology
Journal Volume
87
Journal Issue
7
Date Issued
2013
Author(s)
Abstract
A 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 ffiffi ffi s p 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 0 is excluded at the 95% confidence level for resonance masses M Z 0 < 1:3 TeV for Z 0 0:012M Z 0 , and M < 1:9 TeV for Z 0 0:10M Z 0 .
Type
journal article