Measurement of the t(t)over-bar production cross section in pp collisions at root s=8 TeV in dilepton final states containing one tau lepton

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The top-quark pair production cross section is measured in final states with one electron or muon and one hadronically decaying τ lepton from the process (t\overline{t})→(ℓνℓ)(τντ)(b\overline{b}), where ℓ=e,μ. The data sample corresponds to an integrated luminosity of 19.6 fb⁻¹ collected with the CMS detector in proton–proton collisions at (\sqrt{s})=8TeV. The measured cross section σ(t\overline{t})=257±3 (stat)±24 (syst)±7 (lumi) pb, assuming a top-quark mass of 172.5 GeV, is consistent with the standard model prediction.

CMS, Physics, Top quark, Tau, Astronomy & Astrophysics, Physics, Nuclear, Physics, Particles & Fields
Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Erö, J., Fabjan, C., Friedl, M., Frühwirth, R., Ghete, V. M., Hartl, C., Hörmann, N., Hrubec, J., Jeitler, M., Kiesenhofer, W., Knünz, V., Krammer, M., Krätschmer, I., … Woods, N. (2014). Measurement of the tt¯ production cross section in pp collisions at $\sqrt{s}$=8TeV in dilepton final states containing one τ lepton. In Physics Letters B (Vol. 739, pp. 23–43). Elsevier BV.