Combination of CDF and D0 Measurements of the Single Top Production Cross Section

摘要

We report a combination of the CDF and D0 measurements of the inclusive single top quark production cross section in the s- and t-channels, (sigma)(sub s+t), in p(bar p) collisions at a center of mass energy of 1.96 TeV. The total integrated luminosity included in CDF's analysis is 3.2 fb(sup -1) and D0's analysis has 2.3 fb(sup -1). A Bayesian analysis is used to extract the cross section from the distributions of multivariate discriminants provided by the collaborations. For a top quark mass m(sub t) = 170 GeV/c(sup 2), we measure a cross section of 2.76(sub -0.47)(sup +0.58) pb. We extract the CKM matrix element 'V(sub tb)' = 0.88 (+-) 0.07 with a 95% C.L. lower limit of 'V(sub tb)' > 0.77.