Measurement of the tt production cross section in pp collisions at 7 TeV in lepton+jets events using b-quark jet identification

Journal Article · Tue Nov 01 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.84.092004· OSTI ID:21607996

Chatrchyan, S; Khachatryan, V; Sirunyan, A M; Tumasyan, A ^[1]; Adam, W; Bergauer, T; Dragicevic, M; Eroe, J; Fabjan, C; Friedl, M; Fruehwirth, R; Ghete, V M; Hammer, J; Haensel, S; Hoch, M; Hoermann, N; Hrubec, J; Jeitler, M; Kiesenhofer, W; Krammer, M ^[2]

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1. Yerevan Physics Institute, Yerevan (Armenia)
2. Institut fuer Hochenergiephysik der OeAW, Wien (Austria)

A new measurement of the inclusive production cross section for pp{yields}tt is performed at a center-of-mass energy of 7 TeV using data collected by the CMS experiment at the LHC. The analysis uses a data sample corresponding to an integrated luminosity of 36 pb{sup -1}, and is based on the final state with one isolated, high transverse momentum muon or electron, missing transverse energy, and hadronic jets. The tt content of the selected events is enhanced by requiring the presence of at least one jet consistent with b-quark hadronization. The measured cross section is 150{+-}9(stat){+-}17(syst){+-}6(lumi) pb and is in agreement with higher-order QCD calculations. The combination of this measurement with a previous CMS result based on dileptons gives 154{+-}17(stat+syst){+-}6(lumi) pb.

• OSTI ID: 21607996
• Journal Information: Physical Review. D, Particles Fields, Vol. 84, Issue 9; Other Information: DOI: 10.1103/PhysRevD.84.092004; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

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