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Title: Measurement of the top pair production cross section in 8 TeV proton-proton collisions using kinematic information in the lepton plus jets final state with ATLAS

A measurement is presented of the t¯t inclusive production cross section in pp collisions at a center-of-mass energy of √s=8 TeV using data collected by the ATLAS detector at the CERN Large Hadron Collider. Our measurement was performed in the lepton þ jets final state using a data set corresponding to an integrated luminosity of 20.3 fb-1. Then, the cross section was obtained using a likelihood discriminant fit and b-jet identification was used to improve the signal-to-background ratio. The inclusive t¯t production cross section was measured to be 260 ± 1(stat)+22-23(stat) ± 8(lum9) ± 4(beam) pb assuming a top-quark mass of 172.5 GeV, in good agreement with the theoretical prediction of 253+13 -15 pb. The t¯t → (e, μ) + jets production cross section in the fiducial region determined by the detector acceptance is also reported.
Authors:
 [1]
  1. Aix-Marseille Universite and CNRS/IN2P3 (France). et al.
Publication Date:
OSTI Identifier:
1188518
Report Number(s):
BNL-108235-2015-JA
Journal ID: ISSN 1550-7998; KA1101021; TRN: US1600851
Grant/Contract Number:
AC03-76SF00515; AC02-06CH11357; AC02-05CH11231; SC0012704; SC00112704
Type:
Published Article
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 91; Journal Issue: 11; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Argonne National Laboratory (ANL), Argonne, IL (United States) (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Contributing Orgs:
ATLAS Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS