Measurement of top quark polarisation in t-channel single top quark production

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10333605" target="_blank" >RIV/00216208:11320/16:10333605 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/JHEP04(2016)073" target="_blank" >http://dx.doi.org/10.1007/JHEP04(2016)073</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP04(2016)073" target="_blank" >10.1007/JHEP04(2016)073</a>

Result language
angličtina
Original language name
Measurement of top quark polarisation in t-channel single top quark production
Original language description
A first measurement of the top quark spin asymmetry, sensitive to the top quark polarisation, in t-channel single top quark production is presented. It is based on a sample of pp collisions at a centre-of-mass energy of 8TeV corresponding to an integrated luminosity of 19.7 fb(-1). A high-purity sample of t-channel single top quark events with an isolated muon is selected. Signal and background components are estimated using a fit to data. A differential cross section measurement, corrected for detector effects, of an angular observable sensitive to the top quark polarisation is performed. The differential distribution is used to extract a top quark spin asymmetry of 0.26 +/- 0.03(stat) +/- 0.10(syst), which is compatible with a p-value of 4.6% with the standard model prediction of 0.44.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BF - Elementary particle theory and high energy physics
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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