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
Name
Aaltonen-2009-Top quark mass measu.pdf
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Checksum (MD5)
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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
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
Date Issued
April 2009
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
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].
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
http://dx.doi.org/10.1103/PhysRevD.79.072010
