Measurement of the ttbar production cross section using dilepton events in ppbar collisions

Details Measurement of the ttbar production cross section using dilepton events in ppbar collisions Measurement of the ttbar production cross section using dilepton events in ppbar collisions

2011-05-26

arxiv.org/abs/1105.5384v2

Physics Letters B 704 (2011), pp. 403-410

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages, published in Phys. Lett. B

Scientific paper

We present a measurement of the ttbar production cross section sigma(ttbar) in ppbar collisions at sqrt{s} = 1.96 TeV using 5.4 fb-1 of integrated luminosity collected with the D0 detector. We consider final states with at least two jets and two leptons (ee, emu, mumu), and events with one jet for the the emu final state as well. The measured cross section is sigma(ttbar)= 7.36 +0.90-0.79 (stat + syst) pb. This result combined with the cross section measurement in the lepton + jets final state yields sigma(ttbar)=7.56 +0.63-0.56 (stat + syst) pb, which agrees with the standard model expectation. The relative precision of 8% of this measurement is comparable to the latest theoretical calculations.

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