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 .
2013
87
072002
072019
S. Chatrchyan;V. Khachatryan;A. M. Sirunyan;A. Tumasyan;W. Adam;E. Aguilo;T. Bergauer;M. Dragicevic;J. Erö;C. Fabjan;M. Friedl;R. Frühwirt...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/145164
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