The top quark pair production cross section is measured in dilepton events with one electron or muon, and one hadronically decaying τ lepton from the decay tt̅ →(ℓνℓ)(τhντ)bb̅ , (ℓ=e,μ). The data sample corresponds to an integrated luminosity of 2.0  fb-1 for the electron channel and 2.2  fb-1 for the muon channel, collected by the CMS detector at the LHC. This is the first measurement of the tt̅ cross section explicitly including τ leptons in proton-proton collisions at √s=7  TeV. The measured value σtt̅ =143±14(stat)±22(syst)±3(lumi)  pb is consistent with the standard model predictions.

Measurement of the tt¯ production cross section in pp collisions at sqrt[s]=7  TeV in dilepton final states containing a τ

TOSI, SILVANO;
2012

Abstract

The top quark pair production cross section is measured in dilepton events with one electron or muon, and one hadronically decaying τ lepton from the decay tt̅ →(ℓνℓ)(τhντ)bb̅ , (ℓ=e,μ). The data sample corresponds to an integrated luminosity of 2.0  fb-1 for the electron channel and 2.2  fb-1 for the muon channel, collected by the CMS detector at the LHC. This is the first measurement of the tt̅ cross section explicitly including τ leptons in proton-proton collisions at √s=7  TeV. The measured value σtt̅ =143±14(stat)±22(syst)±3(lumi)  pb is consistent with the standard model predictions.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11567/458319
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