Measurement of the tt̅ production cross section in pp collisions at √s=7  TeV in dilepton final states containing a τ

Measurement of the tt̅ production cross section in pp collisions at √s=7  TeV in dilepton final states containing a τ

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 →(ℓν[subscript ℓ])(τ[subscript h]ν[subscript τ])bb̅ , (ℓ=e,μ). The data sample corresponds to an integrated luminosity of 2.0  fb[superscrip...

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Bibliographic Details
Main Authors: Bendavid, Joshua L., Busza, Wit, Butz, Erik M., Cali, Ivan Amos, Chan, M., Dutta, Valentina, Gomez-Ceballos, Guillelmo, Goncharov, Maxim, Hahn, Kristian Allan, Kim, Y., Klute, Markus, Li, W., Ma, Teng, Nahn, Steven, Paus, Christoph M. E., Ralph, Duncan Kelley, Stephans, George S. F., Sung, Kevin Kai Hong, Velicanu, Dragos Alexandru, Wenger, Edward Allen, Wyslouch, Boleslaw, Yilmaz, Yetkin, Yoon, A. S., Zanetti, Marco, Bauer, Gerry P, Lee, Yen-Jie, Luckey Jr, P David, Roland, Christof E, Roland, Gunther M, Rudolph, Matthew Scott, Stoeckli, Fabian, Sumorok, Konstanty C, Wolf, Roger, Xie, Si, Yang, Mingming
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Language:en_US
Published: American Physical Society 2012
Online Access:http://hdl.handle.net/1721.1/72142
https://orcid.org/0000-0002-3831-9071
https://orcid.org/0000-0003-3106-4894
https://orcid.org/0000-0001-6332-5839
https://orcid.org/0000-0001-8983-2169
https://orcid.org/0000-0002-1260-777X
https://orcid.org/0000-0002-6047-4211
https://orcid.org/0000-0003-3681-0649
https://orcid.org/0000-0003-2593-7767
https://orcid.org/0000-0002-0869-5631
Description
Summary: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 →(ℓν[subscript ℓ])(τ[subscript h]ν[subscript τ])bb̅ , (ℓ=e,μ). The data sample corresponds to an integrated luminosity of 2.0  fb[superscript -1] for the electron channel and 2.2  fb[superscript -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 σ[subscript tt̅] =143±14(stat)±22(syst)±3(lumi)  pb is consistent with the standard model predictions.

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