Measurement of the t-Channel Single Top Quark Production Cross Section in pp̅ Collisions at √s= 7 TeV

Authors

S. Chatrchyan, Yerevan Physics Institute, Yerevan, Armenia
Kenneth A. Bloom, University of Nebraska-LincolnFollow
S. Bose, University of Nebraska-LincolnFollow
Jamila Butt, University of Nebraska-Lincoln
Daniel R. Claes, University of Nebraska-LincolnFollow
Aaron Dominguez, University of Nebraska-LincolnFollow
Michael Eads, University of Nebraska-LincolnFollow
J Keller, University of Nebraska-LincolnFollow
T Kelly, University of Nebraska-Lincoln
Ilya Kravchenko, University of Nebraska-LincolnFollow
J. Lazo-Flores, University of Nebraska-LincolnFollow
Helena Malbouisson, University of Nebraska-Lincoln
Sudhir Malik, University of Nebraska-LincolnFollow
Gregory Snow, University of Nebraska-LincolnFollow

Date of this Version

2011

Citation

PHYSICAL REVIEW LETTERS 107, 091802 (2011); DOI: 10.1103/PhysRevLett.107.091802

Comments

Copyright 2011 CERN, for the CMS Collaboration

Abstract

Electroweak production of the top quark is measured for the first time in pp collisions at √s= 7 TeV, using a data set collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 36 pb^-1. With an event selection optimized for t-channel production, two complementary analyses are performed. The first one exploits the special angular properties of the signal, together with background estimates from the data. The second approach uses a multivariate analysis technique to probe the compatibility with signal topology expected from electroweak top-quark production. The combined measurement of the cross section is 83.6±29.8 (stat + syst) ± 3.3 (lumi) pb, consistent with the standard model expectation.