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Searches for new physics using the ttbar invariant mass distribution in pp collisions at sqrt(s)=8 TeV

Abstract : Searches for anomalous top quark-antiquark production are presented, based on pp collisions at sqrt(s) = 8 TeV. The data, corresponding to an integrated luminosity of 19.7 inverse femtobarns, were collected with the CMS detector at the LHC. No excess of events above the yield expected from the standard model is observed. Limits on the production cross section times branching fraction probe, for the first time, a region of parameter space for certain models of new physics not yet constrained by precision measurements.
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http://hal.in2p3.fr/in2p3-00860076
Contributor : Sylvie Flores <>
Submitted on : Tuesday, September 10, 2013 - 7:45:31 AM
Last modification on : Wednesday, November 25, 2020 - 4:10:43 PM

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S. Chatrchyan, M. Besançon, F. Couderc, M. Dejardin, D. Denegri, et al.. Searches for new physics using the ttbar invariant mass distribution in pp collisions at sqrt(s)=8 TeV. Physical Review Letters, American Physical Society, 2013, 111, pp.211804. ⟨10.1103/PhysRevLett.111.211804⟩. ⟨in2p3-00860076⟩

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