# Measurement of the $t\bar{t}$ Production Cross Section in $p\bar{p}$ Collisions at $\sqrt{s}$ = 1.96 TeV using Lepton + Jets Events with Jet Probability b-tagging

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_-1.0(stat.)+1.1_-1.0(syst.) 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00137290
Contributor : Dominique Girod <>
Submitted on : Monday, March 19, 2007 - 1:55:33 PM
Last modification on : Saturday, December 12, 2020 - 3:16:00 AM
Long-term archiving on: : Wednesday, April 7, 2010 - 1:39:14 AM

### Files

in2p3-00137290.pdf
Files produced by the author(s)

### Citation

A. Abulencia, D. Acosta, J. Adelman, T. Affolder, T. Akimoto, et al.. Measurement of the $t\bar{t}$ Production Cross Section in $p\bar{p}$ Collisions at $\sqrt{s}$ = 1.96 TeV using Lepton + Jets Events with Jet Probability b-tagging. Physical Review D, American Physical Society, 2006, 74, pp.072006. ⟨10.1103/PhysRevD.74.072006⟩. ⟨in2p3-00137290⟩

Record views