Top Quark Mass Measurement in the t anti-t All Hadronic Channel using a Matrix Element Technique in p anti-p Collisions at s**91/2) = 1.96-TeV

Journal Article · Sat Nov 01 04:00:00 EDT 2008 · Submitted to Phys.Rev.D

OSTI ID:947216

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

We present a measurement of the top quark mass in the all-hadronic channel (t{bar t} {yields} b{bar b} q{sub 1}{bar q}{sub 2}q{sub 3}{bar q}{sub 4}) using 943 pb{sup -1} of p{bar p} collisions at {radical}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 t{bar t} 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{sup 2}. The combined uncertainty on the top quark mass is 4.3 GeV/c{sup 2}.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 947216
• Report Number(s): FERMILAB-PUB-08-517-E; arXiv eprint number arXiv:0811.1062
• Journal Information: Submitted to Phys.Rev.D, Journal Name: Submitted to Phys.Rev.D
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DECAY
Experiment-HEP
FERMILAB
FERMILAB COLLIDER DETECTOR
MATRIX ELEMENTS
PROBABILITY
PRODUCTION
STANDARD MODEL
T QUARKS