Measurement of the t t¯ production cross section in the dilepton channel in pp collisions at √s = 8 TeV

Authors

S. Chatrchyan, Yerevan Physics Institute
Ekaterina Avdeeva, University of Nebraska-LincolnFollow
Kenneth A. Bloom, University of Nebraska - LincolnFollow
S. Bose, University of Nebraska-LincolnFollow
Daniel R. Claes, University of Nebraska-LincolnFollow
Aaron Dominguez, University of Nebraska-LincolnFollow
Rebeca Gonzalez Suarez, University of Nebraska-LincolnFollow
J. Keller, University of Nebraska-LincolnFollow
D. Knowlton, University of Nebraska-LincolnFollow
Ilya Kravchenko, University of Nebraska-LincolnFollow
J. Lazo-Flores, University of Nebraska-LincolnFollow
S. Malik, University of Nebraska-LincolnFollow
F. Meier, University of Nebraska-LincolnFollow
Gregory R. Snow, University of Nebraska-LincolnFollow
CMS collaboration, CMS collaboration

Date of this Version

2-5-2014

Citation

JHEP02(2014)024; doi:10.1007/JHEP02(2014)024

Comments

Copyright © 2014 CERN, issued under CC license; published by Springer.

Abstract

The top-antitop quark (t t¯) production cross section is measured in protonproton collisions at √s = 8TeV with the CMS experiment at the LHC, using a data sample corresponding to an integrated luminosity of 5.3 fb⁻¹. The measurement is performed by analysing events with a pair of electrons or muons, or one electron and one muon, and at least two jets, one of which is identified as originating from hadronisation of a bottom quark. The measured cross section is 239 ± 2 (stat.) ± 11 (syst.) ± 6 (lum.) pb, for an assumed top-quark mass of 172.5 GeV, in agreement with the prediction of the standard model.