Szczegóły publikacji
Opis bibliograficzny
Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at $\sqrt{s}$=8 TeV / G. Aad, [et al.], L. ADAMCZYK, [et al.], T. BOŁD, [et al.], W. DĄBROWSKI, [et al.], I. GRABOWSKA-BOŁD, [et al.], K. W. JANAS, [et al.], P. A. JANUS, [et al.], S. KOPERNY, [et al.], I. K. ŁAKOMIEC, [et al.], K. MAJ, [et al.], B. MINDUR, [et al.], A. OGRODNIK, [et al.], P. PALNI, [et al.], M. PRZYBYCIEŃ, [et al.], V. AVATI, L. GRZANKA, M. MALAWSKI, [et al.] // The Journal of High Energy Physics [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 1029-8479. — 2020 — iss. 8 art. no. 051, s. [1], 1–66. — Bibliogr. s. 26–29, Abstr. — Publikacja dostępna online od: 2020-08-12
Autorzy (5246)
- AGHAdamczyk Leszek
- AGHAvati Valentina
- AGHBołd Tomasz
- AGHDąbrowski Władysław
- AGHGrabowska-Bołd Iwona
- AGHGrzanka Leszek
- AGHJanas Krzysztof W.
- AGHJanus Piotr
- AGHKoperny Stefan
- AGHŁakomiec Inga K.
- AGHMaj Klaudia
- AGHMalawski Maciej
- AGHMindur Bartosz
- AGHOgrodnik Agnieszka
- AGHPalni Prabhakar
- AGHPrzybycień Mariusz
- Aad Georges
Słowa kluczowe
Dane bibliometryczne
ID BaDAP | 130103 |
---|---|
Data dodania do BaDAP | 2020-09-18 |
Tekst źródłowy | URL |
DOI | 10.1007/JHEP08(2020)051 |
Rok publikacji | 2020 |
Typ publikacji | artykuł w czasopiśmie |
Otwarty dostęp | |
Creative Commons | |
Czasopismo/seria | The Journal of High Energy Physics |
Abstract
The combination of measurements of the W boson polarization in top quark decays performed by the ATLAS and CMS collaborations is presented. The measurements are based on proton-proton collision data produced at the LHC at a centre-of-mass energy of 8 TeV, and corresponding to an integrated luminosity of about 20 fb(-1)for each experiment. The measurements used events containing one lepton and having different jet multiplicities in the final state. The results are quoted as fractions of W bosons with longitudinal (F-0), left-handed (F-L), or right-handed (F-R) polarizations. The resulting combined measurements of the polarization fractions are F-0= 0.693 +/- 0.014 and F-L= 0.315 +/- 0.011. The fractionF(R)is calculated from the unitarity constraint to be F-R=-0.008 +/- 0.007. These results are in agreement with the standard model predictions at next-to-next-to-leading order in perturbative quantum chromodynamics and represent an improvement in precision of 25 (29)% for F-0(F-L) with respect to the most precise single measurement. A limit on anomalous right-handed vector (V-R), and left- and right-handed tensor (g(L), g(R)) tWb couplings is set while fixing all others to their standard model values. The allowed regions are [-0.11,0.16] for V-R, [-0.08,0.05] for g(L), and [-0.04,0.02] for g(R), at 95% confidence level. Limits on the corresponding Wilson coefficients are also derived.