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Measurement of sin .sup.2./sup.θ.sup.l./sup..sub.eff./sub. and Z-light quark couplings using the forward-backward charge asymmetry in ppbar -> Z/gamma* -> e.sup.+./sup.e.sup.-./sup. events with L=5.0 fb.sup.-1./sup. at root s=1.96 TeV

SYSNO ASEP	0367741
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Measurement of sin ²θ^l_eff and Z-light quark couplings using the forward-backward charge asymmetry in ppbar -> Z/gamma* -> e⁺e^- events with L=5.0 fb^-1 at root s=1.96 TeV
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	421
Source Title	Physical Review D: Particles, Fields, Gravitation and Cosmology. - : American Physical Society - ISSN 1550-7998 Roč. 84, č. 1 (2011), "012007-1"-"012007-14"
Number of pages	14 s.
Language	eng - English
Country	US - United States
Keywords	D0 ; Tevatron ; asymmetry ; quark ; Weinberg angle ; electron positron ; Z0
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	000293130600001
DOI	10.1103/PhysRevD.84.012007
Annotation	We measure the mass dependence of the forward-backward charge asymmetry in 157 553 p (p) over bar -> Z/gamma* -> e(+)e(-) interactions, corresponding to 5.0 fb(-1) of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron Collider at root s = 1.96 TeV. The effective weak mixing angle (theta(l)(eff)) from this process involving predominantly the first generation of quarks is extracted as sin(2)theta(l)(eff) = 0.2309 +/- 0.0008(stat.) +/- 0: 0006(syst.). We also present the most precise direct measurement of the vector and axial-vector couplings of u and d quarks to the Z boson.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2013

Number of the records: 1