Measurement of the t anti-t production cross section and top quark mass extraction using dilepton events in p anti-p collisions
(2009) Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 679, p. 177 (2009)
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- Abstract
- We present a measurement of the top quark pair production cross section in pp¯ collisions at s=1.96 TeV using approximately 1 fb −1 collected with the DØ detector. We consider decay channels containing two high pT charged leptons where one lepton is identified as an electron or a muon while the other lepton can be an electron, a muon or a hadronically decaying τ lepton. For a mass of the top quark of 170 GeV, the measured cross section is 7.5−1.0+1.0(stat)−0.6+0.7(syst)−0.5+0.6(lumi) pb . Using ℓτ events only, we measure: σtt¯×B(tt¯→ℓτbb¯)=0.13−0.08+0.09(stat)−0.06+0.06(syst)−0.02+0.02(lumi) pb . Comparing the measured cross section as a function of the mass of the top quark with a partial next-to-next-to leading order Quantum Chromodynamics theoretical prediction, we extract a mass of the top quark of 171.5−8.8+9.9 GeV , in agreement with direct measurements.
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Tanasijczuk, A. J., D0, & et al. (2009). Measurement of the t anti-t production cross section and top quark mass extraction using dilepton events in p anti-p collisions. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 679, 177. https://doi.org/10.1016/j.physletb.2009.07.032 (Original work published 2009)