Measurements of single top quark production cross sections and │Vtb│ in pp̅ collisions at √s= 1.96 TeV

Authors

V. M. Abazov, Joint Institute for Nuclear Research, Dubna, Russia
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Daniel R. Claes, University of Nebraska-LincolnFollow
Kayle DeVaughan, University of Nebraska-Lincoln
Aaron Dominguez, University of Nebraska-LincolnFollow
Michael Eads, University of Nebraska-LincolnFollow
Ioannis Katsanos, University of Nebraska-LincolnFollow
Sudhir Malik, University of Nebraska-LincolnFollow
Gregory Snow, University of Nebraska-LincolnFollow
D0 Collaboration

Document Type

Article

Date of this Version

2011

Citation

PHYSICAL REVIEW D 84, 112001 (2011); DOI: 10.1103/PhysRevD.84.112001

Comments

Copyright 2011 American Physical Society

Abstract

We present measurements of production cross sections of single top quarks in pp̅ collisions at √s= 1.96 TeV in a data sample corresponding to an integrated luminosity of 5.4 fb^-1 collected by the D0 detector at the Fermilab Tevatron Collider. We select events with an isolated electron or muon, an imbalance in transverse energy, and two, three, or four jets, with one or two of them containing a bottom hadron. We obtain an inclusive cross section of σ(pp̅ → tb + X, tqb + X) = 3.43 ± ^0.73_0.74 pb and use it to extract the CKM matrix element 0.79 < │Vtb│≤ 1 at the 95% C.L. We also measure σ(pp̅ → tb + X= 0.68 ±^0.38_0.35 pb and σ(pp̅ → tqb + X) = 2.86 ± ^0.69_0.63 pb when assuming, respectively, tqb and tb production rates as predicted by the standard model.