Measurement of the top quark mass and pp-bar -->tt-bar cross section in the all-hadronic mode with the CDF II detector
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Aaltonen-2010-Measurement of the t.pdf
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Author(s)
Paus, Christoph M. E.
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Bauer, Gerry P
Makhoul, Khaldoun
Alternative Title
Measurement of the top quark mass and pp̅ →tt̅ cross section in the all-hadronic mode with the CDF II detector
Date Issued
March 2010
Journal
Physical Review D
Publisher
American Physical Society
Citation
CDF Collaboration et al. “Measurement of the top quark mass and pp-bar-->tt-bar cross section in the all-hadronic mode with the CDF II detector.” Physical Review D 81.5 (2010): 052011. © 2010 The American Physical Society.
Version
Final published version
Abstract
We present a measurement of the top quark mass and of the top-antitop (tt̅ ) pair production cross section using pp̅ data collected with the CDF II detector at the Tevatron Collider at the Fermi National Accelerator Laboratory and corresponding to an integrated luminosity of 2.9 fb-1. We select events with six or more jets satisfying a number of kinematical requirements imposed by means of a neural-network algorithm. At least one of these jets must originate from a b quark, as identified by the reconstruction of a secondary vertex inside the jet. The mass measurement is based on a likelihood fit incorporating reconstructed mass distributions representative of signal and background, where the absolute jet energy scale (JES) is measured simultaneously with the top quark mass. The measurement yields a value of 174.8±2.4(stat+JES)-1.0+1.2(syst) GeV/c2, where the uncertainty from the absolute jet energy scale is evaluated together with the statistical uncertainty. The procedure also measures the amount of signal from which we derive a cross section, σtt̅ =7.2±0.5(stat)±1.0(syst)±0.4(lum) pb, for the measured values of top quark mass and JES.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.81.052011
