Combination of ATLAS and CMS top-quark pair cross section measurements using proton-proton collisions at sqrt(s) = 7 TeV

Combination of ATLAS and CMS top-quark pair cross section measurements using proton-proton collisions at sqrt(s) = 7 TeV

CMS

Collaboration

2013

12 pages

Report number:

CMS-PAS-TOP-12-003

Experiments:

View in:

CERN Document Server

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Abstract:

% A combination of top-quark pair production cross-section (

\sigma_{\rm t\bar t}

) measurements at a centre-of-mass energy of 7~TeV performed by the ATLAS and CMS experiments at the LHC is presented. The combination includes

\sigma_{\rm t\bar t}

measurements in the lepton+jets, di-lepton, and all jets channels which use between 0.7 and 1.1~fb

^{-1}

of proton-proton collisions. The combined preliminary LHC measurement of the top-quark pair production cross-section is

\sigma_{\rm t\bar t} = 173.3 \pm 2.3~\mathrm{(stat.)} \pm 7.6~\mathrm{(syst.)} \pm 6.3~\mathrm{(lumi.)}~\mathrm{pb} = 173.3 \pm 10.1~\mathrm{pb}

for a top-quark mass of

172.5\mathrm{\ GeV}/c^2

, corresponding to a total uncertainty of 5.8\%. The result is in agreement with the standard model prediction.

Note:

Preliminary results

Data
top: pair production
p p: scattering
top: mass
CERN LHC Coll
ATLAS
CMS
dilepton: final state
channel cross section: measured
experimental results

References(35)

Figures(1)

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