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Combination of t anti-t cross section measurements and constraints on the mass of the top quark and its decays into charged Higgs bosons

SYSNO ASEP	0335067
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Combination of t anti-t cross section measurements and constraints on the mass of the top quark and its decays into charged Higgs bosons
Title	Kombinace top anti-top účinného průřezu a omezení na hmotu top kvarku a na jeho rozpady na nabité Higgsovy bosony
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	500
Source Title	Physical Review D: Particles, Fields, Gravitation and Cosmology. - : American Physical Society - ISSN 1550-7998 Roč. 80, č. 7 (2009), 071102/1-071102/8
Number of pages	8 s.
Language	eng - English
Country	US - United States
Keywords	top quark ; D0 ; Higgs boson
Subject RIV	BF - Elementary Particles and High Energy Physics
R&D Projects	LC527 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	LA08047 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z10100502 - FZU-D (2005-2011)
UT WOS	000271353400002
DOI	10.1103/PhysRevD.80.071102
Annotation	We combine measurements of the top quark pair production cross section in ppbar collisions in the l+jets, ll and tau-l final states (where l is an electron or muon) at a center of mass energy of sqrt(s)=1.96 TeV in 1fb^{-1} of data collected with the D0 detector. For a top quark mass of 170 GeV, we obtain sigma_ttbar=8.18^{+0.98}_{-0.87} pb. In addition, the ratios of ttbar cross sections in different final states are used to set upper limits on the branching fractions B(t -> H^{+}b -> tau nu b) and B(t -> H^{+}b -> c sbar b) as a function of charged Higgs boson mass. Based on predictions from higher order quantum chromodynamics, we extract a mass for the top quark from the combined ttbar cross section.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2010

Number of the records: 1