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Phys. Rev. D 76, 072009 (2007) [19 pages]

Measurement of the pp̅ →tt̅ production cross section and the top quark mass at s=1.96  TeV in the all-hadronic decay mode

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T. Aaltonen et al. CDF Collaboration
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Received 25 June 2007; published 22 October 2007

We report the measurements of the tt̅ production cross section and of the top quark mass using 1.02  fb-1 of pp̅ data collected with the CDF II detector at the Fermilab Tevatron. We select events with six or more jets on which a number of kinematical requirements are imposed by means of a neural network algorithm. At least one of these jets must be identified as initiated by a b-quark candidate by the reconstruction of a secondary vertex. The cross section is measured to be σtt̅ =8.3±1.0(stat)-1.5+2.0(syst)±0.5(lumi)  pb, which is consistent with the standard model prediction. The top quark mass of 174.0±2.2(stat)±4.8(syst)  GeV/c2 is derived from a likelihood fit incorporating reconstructed mass distributions representative of signal and background.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.76.072009
DOI:
10.1103/PhysRevD.76.072009
PACS:
14.65.Ha, 13.85.Ni, 13.85.Qk