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Search for Z′ resonances decaying to tt-bar in dilepton+jets final states in pp collisions at s√=7 TeV
Baringer, Philip S. Bean, Alice Benelli, Gabriele Kenny, R. P., III Murray, Michael J. Noonan, Danny Sanders, Stephen J. Stringer, Robert W. Tinti, Gemma Wood, Jeffrey Scott
Baringer, Philip S.
Bean, Alice
Benelli, Gabriele
Kenny, R. P., III
Murray, Michael J.
Noonan, Danny
Sanders, Stephen J.
Stringer, Robert W.
Tinti, Gemma
Wood, Jeffrey Scott
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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 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 M(Z′)<1.3 TeV for Γ(Z′)=0.012M(Z′), and M<1.9 TeV for Γ(Z′)=0.10M(Z′).
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This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.87.072002.
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2013-04-03
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American Physical Society
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Baringer_4-3-2013.pdf
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S. Chatrchyan et al. (CMS Collaboration). (2013). "Search for Z′ resonances decaying to tt-bar in dilepton+jets final states in pp collisions at s√=7 TeV." Physical Review D, 87(7):072002. http://www.dx.doi.org/10.1103/PhysRevD.87.072002.