Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at root s=8 TeV
dc.WoS.categories | Physics, Particles & Fields | en_US |
dc.authorid | 0000-0001-5050-8441 | en_US |
dc.contributor.author | Çetin, Serkant Ali | |
dc.date.accessioned | 2020-11-09T13:41:49Z | |
dc.date.available | 2020-11-09T13:41:49Z | |
dc.date.issued | 2020-08-12 | |
dc.department | Fakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümü | en_US |
dc.description | 67 pages | en_US |
dc.description.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. | en_US |
dc.fullTextLevel | Full Text | en_US |
dc.identifier.doi | 10.1007/JHEP08(2020)051 | |
dc.identifier.issn | 1029-8479 | |
dc.identifier.scopus | 2-s2.0-85090035581 | en_US |
dc.identifier.uri | https://hdl.handle.net/11411/2547 | |
dc.identifier.uri | https://doi.org/10.1007/JHEP08(2020)051 | |
dc.identifier.wos | WOS:000562898300001 | en_US |
dc.identifier.wosquality | Q1 | en_US |
dc.indekslendigikaynak | Web of Science | en_US |
dc.indekslendigikaynak | Scopus | en_US |
dc.issue | 8 | en_US |
dc.language.iso | en | en_US |
dc.national | International | en_US |
dc.numberofauthors | 1000+ | en_US |
dc.publisher | Springer | en_US |
dc.relation.ispartof | Journal of High Energy Physics | en_US |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |
dc.rights | info:eu-repo/semantics/openAccess | en_US |
dc.subject | Top physics | en_US |
dc.subject | Hadron-Hadron scattering (experiments) | en_US |
dc.title | Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at root s=8 TeV | |
dc.type | Article |