Unformatted text preview: , 2009c.
Abazov et al., 2007c.
Aaltonen et al., 2009f.
Amsler et al., 2008. Aaltonen et al., 2009e.
Abulencia et al., 2007c.
Abazov et al., 2008f.
Abulencia et al., 2006a.
Aaltonen et al., 2007c. Rev. Mod. Phys., Vol. 84, No. 4, October–December 2012 2.2
CDF þ D0o Aaltonen et al., 2009b.
Abazov et al., 2009i.
Abulencia et al., 2007d.
Aaltonen et al., 2007b.
Tevatron Electroweak Working Group, 2009c. Hobbs, Neubauer, and Willenbrock: Tests of the standard electroweak model at . . . 1508 Systematic uncertainties in top mass measurements arise
from both experimental sources and theory. Although the
contribution from calibration uncertainties has been signiﬁcantly reduced as described in the previous paragraph, the
dominant contributions to the systematic uncertainty from
experimental sources are the absolute reconstructed jet energy calibration and the relative calibrations of jets initiated
by b quarks and those from light quarks (u, d, s). Of these, the
uncertainty from the jet calibrations dominates the experimental uncertainties. Uncertainties arising from theory include the production model as assessed by comparing event
generators and fragmentation. The production model uncertainty becomes the dominant theory uncertainty when various
measurements are combined.
Table XXIII and Fig. 44 give a summary of the published
top mass results and a comparison with the 2008 Particle Data
Group (PDG) (Amsler et al., 2008) average. When multiple
results from one experiment using the same method and ﬁnal
state were available, only the highest integrated luminosity
measurement was reported. The result shown in Table XXIII
with highest integrated luminosity used a Ldt ¼ 2:9 fbÀ1
data sample. The Tevatron experiments have now reported
preliminary results using up to 4 fbÀ1 , and these results have
been included in a world average combination by the
Tevatron Electroweak Working Group, with the most recent
such combination (Tevatron Electroweak Working Group,
Mt ¼ 173:1 Æ 0:6ðstatÞ Æ 1:1ðsystÞ GeV=c2 :
ll+lj, CDF [a]
ll, CDF [b]
ll, CDF [c]
ll, CDF [d]
ll, D0 [e]
l+jets, CDF [f]
l+jets, D0 [g]
l+jets, D0 [h]
l+jets, CDF [i]
all jets, CDF [j] PDG ’08
Tevatron Average 170 180 190 200 mt (GeV) FIG. 44 (color online). Published top mass measurements.
For a given experiment and ﬁnal state, the results from different
methods have a signiﬁcant correlation. [a]Aaltonen et al. (2009d);
[b] Aaltonen et al. (2009b); [c] Aaltonen et al. (2008c);
[d] Abulencia et al. (2007c); [e] Abazov et al. (2009i);
[f] Aaltonen et al. (2009c); [g] Abazov et al. (2008f);
[h] Abazov et al. (2007c); [i] Abulencia et al. (2006a);
[j] Aaltonen et al. (2007b); [k] Aaltonen et al. (2009f). Also
shown are the most recent Tevatron combination (Tevatron
Electroweak Working Group, 2009c) and the PDG world average
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