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Measurements of the Top-Quark Mass and the tt̅ Cross Section in the Hadronic τ+jets Decay Channel at √s=1.96  TeV

Author(s)
Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Paus, Christoph M. E.
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Abstract
We present the first direct measurement of the top-quark mass using tt̅ events decaying in the hadronic τ+jets decay channel. Using data corresponding to an integrated luminosity of 2.2  fb[superscript -1] collected by the CDF II detector in pp̅ collisions at √s=1.96  TeV at the Fermilab Tevatron, we measure the tt̅ cross section, σ[subscript tt̅] , and the top-quark mass, M[subscript top]. We extract M[subscript top] from a likelihood based on per-event probabilities calculated with leading-order signal and background matrix elements. We measure σ[subscript tt̅] =8.8±3.3(stat)±2.2(syst)  pb and M[subscript top]=172.7±9.3(stat)±3.7(syst)  GeV/c[superscript 2].
Date issued
2012-11
URI
http://hdl.handle.net/1721.1/75745
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaltonen, T. et al. “Measurements of the Top-Quark Mass and the Tt[over ¯] Cross Section in the Hadronic Τ+jets Decay Channel at Sqrt[s]=1.96  TeV.” Physical Review Letters 109.19 (2012). © 2012 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114

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