A search for resonances decaying to top quark-antiquark pairs is performed using a dilepton þ jets data sample recorded by the CMS experiment at the LHC in pp collisions at ffiffi s p ¼ 7 TeV corresponding to an integrated luminosity of 5:0 fb1. 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 Z0 is excluded at the 95% confidence level for resonance masses MZ0 < 1:3 TeV for Z0 ¼ 0:012MZ0 , and M < 1:9 TeV for Z0 ¼ 0:10MZ0 .
Search for Z' resonances decaying to tt[over ¯] in dilepton+jets final states in pp collisions at sqrt[s]=7 TeV
V. Sola;AMAPANE, Nicola Carlo;ARGIRO', Stefano;CASASSO, STEFANO;COSTA, Marco;MIGLIORE, Ernesto;MONACO, Vincenzo;MUSICH, MARCO;OBERTINO, Maria Margherita;PELLICCIONI, Mario;ROMERO, Alessandra;SACCHI, Roberto;SOLANO, Ada Maria;BELLAN, Riccardo;COVARELLI, Roberto;
2013-01-01
Abstract
A search for resonances decaying to top quark-antiquark pairs is performed using a dilepton þ jets data sample recorded by the CMS experiment at the LHC in pp collisions at ffiffi s p ¼ 7 TeV corresponding to an integrated luminosity of 5:0 fb1. 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 Z0 is excluded at the 95% confidence level for resonance masses MZ0 < 1:3 TeV for Z0 ¼ 0:012MZ0 , and M < 1:9 TeV for Z0 ¼ 0:10MZ0 .File | Dimensione | Formato | |
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PhysRevD.87.072002.pdf
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