Measurement of the <script type="math/tex">t\overline{t}</script> production cross section in <script type="math/tex">p\overline{p}</script> collisions at <script type="math/tex">\sqrt{s}</script>=1.96 TeV using lepton+jets events with jet probability b-tagging

Abulencia, A.; Van Remortel, N.; et al.

doi:10.1103/PHYSREVD.74.072006

Title

Measurement of the $t\overline{t}$ production cross section in $p\overline{p}$ collisions at $\sqrt{s}$ =1.96 TeV using lepton+jets events with jet probability b-tagging

Author

Abulencia, A.

Van Remortel, N.

et al.

Institution/Organisation

CDF Collaboration

Abstract

We present a measurement of the tt̅ production cross section using events with one charged lepton and jets from pp̅ 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 tt̅ production cross section in events with at least one restrictive (tight) b-tagged jet and obtain 8.9-1.0+1.0(stat)-1.0+1.1(syst) pb. The cross section value assumes a top quark mass of mt=178 GeV/c2 in the acceptance corrections. The dependence of the cross section on mt is presented in the paper. This result is consistent with other CDF measurements of the tt̅ 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.

Language

English

Source (journal)

Physical review : D : particles, fields, gravitation, and cosmology / American Physical Society. - Ridge, N.Y., 2004 - 2015

Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003

Publication

Ridge, N.Y. : American Physical Society , 2006

ISSN

1550-7998 [print]

1550-2368 [online]

DOI

10.1103/PHYSREVD.74.072006