Measurement of the W boson polarization in top quark decays with the ATLAS detector

Aad, G.; Abbott, B.; Abdallah, J.; Böhm, Jan; Chudoba, Jiří; Gallus, Petr; Gunther, Jaroslav; Jakoubek, Tomáš; Juránek, Vojtěch; Kepka, Oldřich; Kupčo, Alexander; Kůs, Vlastimil; Lokajíček, Miloš; Marčišovský, Michal; Mikeštíková, Marcela; Myška, Miroslav; Němeček, Stanislav; Růžička, Pavel; Schovancová, Jaroslava; Šícho, Petr; Staroba, Pavel; Svatoš, Michal; Taševský, Marek; Tic, Tomáš; Valenta, J.; Vrba, Václav; Zeman, Martin

doi:https://dx.doi.org/10.1007/JHEP06(2012)088

Number of the records: 1

Measurement of the W boson polarization in top quark decays with the ATLAS detector

1.

SYSNO ASEP	0388401
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Measurement of the W boson polarization in top quark decays with the ATLAS detector
Author(s)	Aad, G. (DE) Abbott, B. (US) Abdallah, J. (ES) Böhm, Jan (FZU-D) Chudoba, Jiří (FZU-D)_{RID, ORCID} Gallus, Petr (FZU-D)_RID Gunther, Jaroslav (FZU-D) Jakoubek, Tomáš (FZU-D)_{RID, ORCID} Juránek, Vojtěch (FZU-D) Kepka, Oldřich (FZU-D)_{RID, ORCID} Kupčo, Alexander (FZU-D)_{RID, ORCID} Kůs, Vlastimil (FZU-D)_RID Lokajíček, Miloš (FZU-D)_{RID, ORCID} Marčišovský, Michal (FZU-D)_{RID, ORCID} Mikeštíková, Marcela (FZU-D)_{RID, ORCID} Myška, Miroslav (FZU-D) Němeček, Stanislav (FZU-D)_{RID, ORCID} Růžička, Pavel (FZU-D) Schovancová, Jaroslava (FZU-D) Šícho, Petr (FZU-D)_{RID, ORCID} Staroba, Pavel (FZU-D)_{RID, ORCID} Svatoš, Michal (FZU-D)_{RID, ORCID} Taševský, Marek (FZU-D)_{RID, ORCID} Tic, Tomáš (FZU-D) Valenta, J. (CZ) Vrba, Václav (FZU-D)_{RID, ORCID} Zeman, Martin (FZU-D)_RID
Number of authors	2868
Source Title	Journal of High Energy Physics. - : Springer - ISSN 1126-6708 Roč. 2012, č. 6 (2012), s. 1-45
Number of pages	45 s.
Language	eng - English
Country	US - United States
Keywords	ATLAS ; LHC ; top quark ; W boson polarization ; anomalous W tb couplings
Subject RIV	BF - Elementary Particles and High Energy Physics
R&D Projects	LA08032 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z10100502 - FZU-D (2005-2011)
UT WOS	000306416500089
DOI	10.1007/JHEP06(2012)088
Annotation	This paper presents measurements of the polarization of W bosons in top quark decays, derived from ttbar events with missing transverse momentum, one charged lepton and at least four jets, or two charged leptons and at least two jets. Data from pp collisions at a centre-of-mass energy of 7 TeV were collected with the ATLAS experiment at the LHC and correspond to an integrated luminosity of 1.04 fb^-1. The measured fractions of longitudinally, left- and right-handed polarization are F_0=0.67+/-0.07, F_L=0.32+/-0.04 and F_R=0.01+/-0.05, in agreement with the Standard Model predictions. As the polarization of the W bosons in top quark decays is sensitive to the Wtb vertex Lorentz structure and couplings, the measurements were used to set limits on anomalous contributions to the Wtb couplings.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2013

Number of the records: 1