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

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

ATLAS

Collaboration

Apr 16, 2015

25 pages

Published in:

Phys.Rev.D 91 (2015) 11, 112013

Published: Jun 24, 2015

e-Print:

1504.04251 [hep-ex]

DOI:

10.1103/PhysRevD.91.112013

PDG:

{{\mathit t}}{{\overline{\mathit t}}}

Production Cross Section in

{{\mathit p}}{{\mathit p}}

\sqrt {s }

Report number:

CERN-PH-EP-2015-024

Experiments:

CERN-LHC-ATLAS

View in:

reference search74 citations

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Abstract: (APS)

A measurement is presented of the tt¯ 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. The measurement was performed in the lepton+jets final state using a data set corresponding to an integrated luminosity of 20.3 fb−1. 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 tt¯ production cross section was measured to be 260±1(stat)−23+22(stat)±8(lumi)±4(beam) pb assuming a top-quark mass of 172.5 GeV, in good agreement with the theoretical prediction of 253−15+13 pb. The tt¯→(e,μ)+jets production cross section in the fiducial region determined by the detector acceptance is also reported.

Note:

Published version, 19 pages plus author list (35 pages total), 3 figures, 2 tables, all figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2013-06/

14.65.Ha
p p: colliding beams
top: pair production
jet: bottom
p p: scattering
top: mass
ATLAS
inclusive production
cross section: measured
bottom: particle identification

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Figures(8)

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