Measurement of the tt Production Cross Section in pp Collisions at √s = 1.96 TeV

Authors

• V. M. Abazov, Joint Institute for Nuclear Research, Dubna, Russia
• Kenneth A. Bloom, University of Nebraska-LincolnFollow
• Gregory Snow, University of Nebraska-LincolnFollow
• D0 Collaboration

Document Type

Article

Date of this Version

May 2008

Comments

Published by American Physical Society. Phys. Rev. Lett. 100, 192004 (2008). http://prl.aps.org. Copyright © 2008 American Physical Society. Permission to use.

Abstract

We measure the tt production cross section in pp collisions at √s = 1.96 TeV in the lepton + jets channel. Two complementary methods discriminate between signal and background: b tagging and a kinematic likelihood discriminant. Based on 0.9 fb^-1 of data collected by the D0 detector at the Fermilab Tevatron Collider, we measure σ_tt = 7.62 ± 0.85 pb, assuming the current world average m_t = 172.6 GeV. We compare our cross section measurement with theory predictions to determine a value for the top-quark mass of 170 ± 7 GeV.