Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at root s=8 TeV
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F20%3A73602362" target="_blank" >RIV/61989592:15310/20:73602362 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/68407700:21220/20:00346703 RIV/68407700:21340/20:00346703 RIV/68407700:21670/20:00346703 RIV/00216208:11320/20:10423605
Výsledek na webu
<a href="https://link.springer.com/article/10.1007/JHEP08(2020)051" target="_blank" >https://link.springer.com/article/10.1007/JHEP08(2020)051</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP08(2020)051" target="_blank" >10.1007/JHEP08(2020)051</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at root s=8 TeV
Popis výsledku v původním jazyce
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.
Název v anglickém jazyce
Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at root s=8 TeV
Popis výsledku anglicky
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.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10303 - Particles and field physics
Návaznosti výsledku
Projekt
Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2020
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
JOURNAL OF HIGH ENERGY PHYSICS
ISSN
1029-8479
e-ISSN
—
Svazek periodika
2020
Číslo periodika v rámci svazku
8
Stát vydavatele periodika
IT - Italská republika
Počet stran výsledku
67
Strana od-do
"051-1"-"051-67"
Kód UT WoS článku
000562898300001
EID výsledku v databázi Scopus
2-s2.0-85090035581