We present a new method to measure the top quark pair production cross section and the background rates with data corresponding to an integrated luminosity of 2.7 fb(-1) from p (p) over bar collisions at root s = 1.96 TeV collected with the CDF II Detector. We select events with a single electron or muon candidate, missing transverse energy, and at least one b-tagged jet. We perform a simultaneous fit to a jet flavor discriminant across nine samples defined by the number of jets and b tags. An advantage of this approach is that many systematic uncertainties are measured in situ and inversely scale with integrated luminosity. We measure a top cross section of sigma(t (t) over bar) 7.64 +/- 0.57(stat + syst) +/- 0.45(luminosity) pb. RI De Cecco, Sandro/B-1016-2012; Robson, Aidan/G-1087-2011; Prokoshin, Fedor/E-2795-2012

Measurement of the top pair production cross section in the lepton plus jets channel using a jet flavor discriminant

PIACENTINO, Giovanni Maria;
2011-01-01

Abstract

We present a new method to measure the top quark pair production cross section and the background rates with data corresponding to an integrated luminosity of 2.7 fb(-1) from p (p) over bar collisions at root s = 1.96 TeV collected with the CDF II Detector. We select events with a single electron or muon candidate, missing transverse energy, and at least one b-tagged jet. We perform a simultaneous fit to a jet flavor discriminant across nine samples defined by the number of jets and b tags. An advantage of this approach is that many systematic uncertainties are measured in situ and inversely scale with integrated luminosity. We measure a top cross section of sigma(t (t) over bar) 7.64 +/- 0.57(stat + syst) +/- 0.45(luminosity) pb. RI De Cecco, Sandro/B-1016-2012; Robson, Aidan/G-1087-2011; Prokoshin, Fedor/E-2795-2012
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11695/5384
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