Top Quark Mass Measurement in the $t \bar{t}$ All Hadronic Channel using a Matrix Element Technique in $p\bar{p}$ Collisions at $\sqrt{s}$ = 1.96-TeV

Aaltonen, T.; Adelman, Jahred A.; Akimoto, T.; Alvarez Gonzalez, B.; Amerio, S.; Amidei, Dante E.; Anastassov, A.; Annovi, Alberto; Antos, J.; Apollinari, G.

doi:10.1103/PhysRevD.79.072010

Top Quark Mass Measurement in the $t \bar{t}$ All Hadronic Channel using a Matrix Element Technique in $p\bar{p}$ Collisions at $\sqrt{s}$ = 1.96-TeV

CDF

Collaboration

Nov, 2008

28 pages

Published in:

Phys.Rev.D 79 (2009) 072010

e-Print:

0811.1062 [hep-ex]

DOI:

10.1103/PhysRevD.79.072010

PDG:

{{\mathit t}}

-Quark Mass (Direct Measurements)

Report number:

FERMILAB-PUB-08-517-E

Experiments:

FNAL-E-0830

View in:

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Abstract: (arXiv)

We present a measurement of the top quark mass in the all-hadronic channel (\tt

\to

\bb

q_{1}\bar{q_{2}}q_{3}\bar{q_{4}}

) using 943 pb

^{-1}

of \ppbar collisions at

\sqrt {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 \ttbar 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

\pm

3.7 (stat.+JES)

\pm

2.1 (syst.) GeV/

c^{2}

. The combined uncertainty on the top quark mass is 4.3 GeV/

c^{2}

.

Note:

submitted to Phys. Rev. D

13.85.Ni
12.15.Ff
14.65.Ha
anti-p p: interaction
top: pair production
final state: ((n)jet)
data analysis method
top: mass
jet: energy
calibration

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Top Quark Mass Measurement in the ttˉt \bar{t}ttˉ All Hadronic Channel using a Matrix Element Technique in ppˉp\bar{p}ppˉ​ Collisions at s\sqrt{s}s​ = 1.96-TeV

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Top Quark Mass Measurement in the $t \bar{t}$ All Hadronic Channel using a Matrix Element Technique in $p\bar{p}$ Collisions at $\sqrt{s}$ = 1.96-TeV