Measurement of the t (t)over-bar production cross-section using e mu events with b-tagged jets in pp collisions at root s = 7 and 8 TeV with the ATLAS detector (vol 76, pg 642, 2014)
Özet
The ATLAS measurement of the inclusive top
quark pair (tt
¯) cross-section σtt
¯ in proton–proton collisions
at √s = 8 TeV has been updated using the final 2012 luminosity calibration. The updated cross-section result is:
σtt
¯ = 242.9 ± 1.7 ± 5.5 ± 5.1 ± 4.2 pb,
where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, knowledge of the
integrated luminosity and of the LHC beam energy. The
result is consistent with theoretical QCD calculations at nextto-next-to-leading order. The measurement of the ratio of
tt cross-sections at √s = 8 TeV and √s = 7 TeV, and
the √s = 8 TeV fiducial measurement corresponding to
the experimental acceptance of the leptons, have also been
updated