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Measurement of top quark polarization in tt¯ lepton+jets final states
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SYSNO ASEP 0484249 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Measurement of top quark polarization in tt¯ lepton+jets final states Author(s) Abazov, V. M. (RU)
Abbott, B. (US)
Acharya, B.S. (IN)
Kupčo, Alexander (FZU-D) RID, ORCID
Lokajíček, Miloš (FZU-D) RID, ORCIDNumber of authors 371 Article number 011101 Source Title Physical Review D. - : American Physical Society - ISSN 2470-0010
Roč. 95, č. 1 (2017), s. 1-9Number of pages 9 s. Language eng - English Country US - United States Keywords Batavia TEVATRON Coll ; DZERO ; helicity ; experimental results ; 1960 GeV-cms Subject RIV BF - Elementary Particles and High Energy Physics OECD category Particles and field physics R&D Projects LM2015068 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LG15047 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 UT WOS 000391860700001 EID SCOPUS 85016313492 DOI 10.1103/PhysRevD.95.011101 Annotation We present a measurement of top quark polarization in tt¯ pair production in pp¯ collisions at s=1.96 TeV using data corresponding to 9.7 fb-1 of integrated luminosity recorded with the D0 detector at the Fermilab Tevatron Collider. We consider final states containing a lepton and at least three jets. The polarization is measured through the distribution of lepton angles along three axes: the beam axis, the helicity axis, and the transverse axis normal to the tt¯ production plane. This is the first measurement of top quark polarization at the Tevatron using lepton+jet final states and the first measurement of the transverse polarization in tt¯ production. The observed distributions are consistent with standard model predictions of nearly no polarization.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2018
Number of the records: 1