Measurement of the tt[over-bar] production cross section in pp[over-bar] collisions at [sqrt]s=1.96 TeV using events with large missing transverse energy and jets
Author(s)
Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Paus, Christoph M. E.; Bauer, Gerry P; Makhoul, Khaldoun
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Alternative title
Measurement of the tt̅ production cross section in pp̅ collisions at √s=1.96 TeV using events with large missing transverse energy and jets
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In this paper we report a measurement of the tt[over-bar] production cross section in pp[over-bar] collisions at [sqrt]s=1.96 TeV using data corresponding to an integrated luminosity of 2.2 fb[superscript -1] collected with the CDF II detector at the Tevatron accelerator. We select events with significant missing transverse energy and high jet multiplicity. This measurement vetoes the presence of explicitly identified electrons and muons, thus enhancing the tau contribution of tt[over-bar] decays. Signal events are discriminated from the background using a neural network, and heavy flavor jets are identified by a secondary-vertex tagging algorithm. We measure a tt[over-bar] production cross section of 7.99±0.55(stat)±0.76(syst)±0.46(lumi) pb, assuming a top mass m[subscript top]=172.5 GeV/c[superscript 2], in agreement with previous measurements and standard model predictions.
Date issued
2011-08Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical Review D
Publisher
American Physical Society
Citation
Aaltonen, T. et al.(CDF Collaboration). "Measurement of the tt[over-bar] production cross section in pp[over-bar] collisions at [sqrt]s=1.96 TeV using events with large missing transverse energy and jets." Phys. Rev. D 84, 032003 (2011)[12 pages]. ©2011 American Physical Society.
Version: Final published version
ISSN
1550-7998
1550-2368