Probing the W tb vertex structure in t-channel single-top-quark production and decay in pp collisions at √s = 8 TeV with the ATLAS detector

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F17%3A00487361" target="_blank" >RIV/68378271:_____/17:00487361 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/JHEP04(2017)124" target="_blank" >http://dx.doi.org/10.1007/JHEP04(2017)124</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP04(2017)124" target="_blank" >10.1007/JHEP04(2017)124</a>

Result language

angličtina

Original language name

Probing the W tb vertex structure in t-channel single-top-quark production and decay in pp collisions at √s = 8 TeV with the ATLAS detector

Original language description

To probe the Wtb vertex structure, top-quark and W-boson polarisation observables are measured from t-channel single-top-quark events produced in proton-proton collisions at a centre-of-mass energy of 8 TeV. The dataset corresponds to an integrated luminosity of 20.2 fb(-1), recorded with the ATLAS detector at the LHC. Selected events contain one isolated electron or muon, large missing transverse momentum and exactly two jets, with one of them identified as likely to contain a b-hadron. Stringent selection requirements are applied to discriminate t-channel single-top-quark events from background. The polarisation observables are extracted from asymmetries in angular distributions measured with respect to spin quantisation axes appropriately chosen for the top quark and the W boson. The asymmetry measurements are performed at parton level by correcting the observed angular distributions for detector effects and hadronisation after subtracting the background contributions. The measured top-quark and W-boson polarisation values are in agreement with the Standard Model predictions. Limits on the imaginary part of the anomalous coupling gR are also set from model-independent measurements.n

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10303 - Particles and field physics

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

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Volume of the periodical

2017

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

50

Pages from-to

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UT code for WoS article

000400278200001

EID of the result in the Scopus database

2-s2.0-85018280474