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Determination of the width of the top quark

SYSNO ASEP	0367641
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Determination of the width of the top quark
Author(s)	Abazov, V. M. (RU) Abbott, B. (US) Abolins, M. (US) Kupčo, Alexander (FZU-D)_{RID, ORCID} Lokajíček, Miloš (FZU-D)_{RID, ORCID}
Number of authors	433
Source Title	Physical Review Letters. - : American Physical Society - ISSN 0031-9007 Roč. 107, č. 2 (2011), "022001-1"-"022001-7"
Number of pages	7 s.
Language	eng - English
Country	US - United States
Keywords	D0 ; top quark
Subject RIV	BF - Elementary Particles and High Energy Physics
R&D Projects	LA08047 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z10100502 - FZU-D (2005-2011)
UT WOS	000286746300004
DOI	10.1103/PhysRevLett.106.022001
Annotation	We extract the total width of the top quark, Gamma(t), from the partial decay width Gamma(t -> Wb) measured using the t-channel cross section for single top-quark production and from the branching fraction B(t -> Wb) measured in t (t) over bar t events using up to 2.3 fb(-1) of integrated luminosity collected by the D0 Collaboration at the Tevatron p (p) over bar Collider. The result is Gamma(t) = 1.99(-0.55)(+0.69) GeV, which translates to a top-quark lifetime of tau(t) = (3.3-(+1.3)(0.9)) x 10(-25) s. Assuming a high mass fourth generation b´ quark and unitarity of the four-generation quark-mixing matrix, we set the first upper limit on vertical bar V(tb´)vertical bar < 0.63 at 95% C.L.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2013

Number of the records: 1