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Top quark mass measurement in the tt[over -bar] all hadronic channel using a matrix element technique in pp[over -bar] collisions at sqrt[s]=1.96 TeV

Author(s)
Xie, Si; Knuteson, Bruce O.; Henderson, C.; Hahn, Kristian Allan; Gomez-Ceballos, Guillelmo; Choudalakis, Georgios; Paus, Christoph M. E.; Makhoul, Khaldoun; Goncharov, Maxim; Bauer, Gerry P; ... Show more Show less
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Alternative title
Top quark mass measurement in the tt̅ all hadronic channel using a matrix element technique in pp̅ collisions at √s=1.96  TeV
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
We present a measurement of the top quark mass in the all hadronic channel (tt̅→bb̅q[subscript 1]q̅[subscript 2]q[subscript 3]q̅[subscript 4] using 943  pb[superscript -1] of pp̅ collisions at √s=1.96  TeV collected at the CDF II detector at Fermilab (CDF). We apply the standard model production and decay matrix element (ME) to tt̅ candidate events. We calculate per-event probability densities according to the ME calculation and construct template models of signal and background. The scale of the jet energy is calibrated using additional templates formed with the invariant mass of pairs of jets. These templates form an overall likelihood function that depends on the top quark mass and on the jet energy scale (JES). We estimate both by maximizing this function. Given 72 observed events, we measure a top quark mass of 171.1±3.7(stat+JES)±2.1(syst)  GeV/c[superscript 2]. The combined uncertainty on the top quark mass is 4.3  GeV/c[superscript 2].
Date issued
2009-04
URI
http://hdl.handle.net/1721.1/51844
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review D
Publisher
American Physical Society
Citation
CDF Collaboration et al. “Top quark mass measurement in the tt[over -bar] all hadronic channel using a matrix element technique in pp[over -bar] collisions at sqrt[s]=1.96 TeV.” Physical Review D 79.7 (2009): 072010. © 2009 The American Physical Society
Version: Final published version
ISSN
1550-2368
1550-7998

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