Measurements of the Top-quark Mass and the $$t\bar{t}$$ Cross Section in the Hadronic $$\tau +$$ Jets Decay Channel at $$\sqrt{s} = 1.96$$ TeV

Journal Article · Wed Aug 01 00:00:00 EDT 2012 · Phys.Rev.Lett.109:192001,2012

DOI:https://doi.org/10.1103/PhysRevLett.109.192001· OSTI ID:1050044

Aaltonen, T; Alvarez Gonzalez, B; Amerio, S; Amidei, D; Anastassov, A; Annovi, A; Antos, J; Apollinari, G; Appel, J A; Arisawa, T; Artikov, A

We present the first direct measurement of the top-quark mass using t{bar t} events decaying in the hadronic {tau} + jets decay channel. Using data corresponding to an integrated luminosity of 2.2 fb{sup -1} collected by the CDF II detector in p{bar p} collisions at {radical}s = 1.96 TeV at the Fermilab Tevatron, we measure the t{bar t} cross section, {sigma}{sub t{bar t}}, and the top-quark mass, M{sub top}. We extract M{sub top} from a likelihood based on per-event probabilities calculated with leading-order signal and background matrix elements. We measure {sigma}{sub t{bar t}} = 8.8 {+-} 3.3 (stat) {+-} 2.2 (syst) pb and M{sub top} = 172.7 {+-} 9.3 (stat) {+-} 3.7 (syst) GeV/c{sup 2}.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1050044
• Report Number(s): FERMILAB-PUB-12-486-E; arXiv eprint number arXiv:1208.5720; TRN: US1204530
• Journal Information: Phys.Rev.Lett.109:192001,2012, Journal Name: Phys.Rev.Lett.109:192001,2012
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CROSS SECTIONS
DECAY
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
LUMINOSITY
MATRIX ELEMENTS
Experiment-HEP