Measurement of the t(t)over-bar production cross section in pp collisions at 7 TeV in lepton plus jets events using b-quark jet identification

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Abstract

A new measurement of the inclusive production cross section for pp -> t (t) over bar 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(-1), and is based on the final state with one isolated, high transverse momentum muon or electron, missing transverse energy, and hadronic jets. The t (t) over bar 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.

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  • POMPILI A.;MARANGELLI B.;CALABRIA C.;SELVAGGI G.;LUSITO L.;BARBONE L.;ABBRESCIA M.;PACIFICO N.;MY S.;NUZZO S.V.

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Anno di pubblicazione

2011

ISSN

1550-7998

ISBN

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Numero di citazioni Wos

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Numero di citazioni Scopus

66

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Settori ERC

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Codici ASJC

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