Measurement of the $tar{t}$ Production Cross Section in $par{p}$ Collisions at $sqrt{s}$ = 1.96 TeV using Lepton Jets Events with Jet Probability b-taggingReport as inadecuate




Measurement of the $tar{t}$ Production Cross Section in $par{p}$ Collisions at $sqrt{s}$ = 1.96 TeV using Lepton Jets Events with Jet Probability b-tagging - Download this document for free, or read online. Document in PDF available to download.

1 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies

Abstract : We present a measurement of the tt-bar production cross section using events with one charged lepton and jets from p anti-p collisions at a center-of-mass energy of 1.96 TeV. A b-tagging algorithm based on the probability of displaced tracks coming from the event interaction vertex is applied to identify b quarks from top decay. Using 318 pb-1 of data collected with the CDF II detector, we measure the tt-bar production cross section in events with at least one restrictive tight b-tagged jet and obtain 8.9+1.0 -1.0stat.+1.1 -1.0syst. pb. The cross section value assumes a top quark mass of m t = 178 GeV-c2 in the acceptance corrections. The dependence of the cross section on m t is presented in the paper. This result is consistent with other CDF measurements of the tt-bar cross section using different samples and analysis techniques, and has similar systematic uncertainties. We have also performed consistency checks by using the b-tagging probability function to vary the signal to background ratio and also using events that have at least two b-tagged jets.





Author: A. Abulencia D. Acosta J. Adelman T. Affolder T. Akimoto M. G. Albrow D. Ambrose S. Amerio D. Amidei A. Anastassov K. Anikeev A.

Source: https://hal.archives-ouvertes.fr/



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