Observation of the associated production of a top quark and a Z boson in pp collisions at root s=13 TeV with the ATLAS detector

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F20%3A73602293" target="_blank" >RIV/61989592:15310/20:73602293 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21220/20:00346769 RIV/68407700:21340/20:00346769 RIV/68407700:21670/20:00346769 RIV/00216208:11320/20:10423574
Result on the web
<a href="https://link.springer.com/article/10.1007%2FJHEP07%282020%29124" target="_blank" >https://link.springer.com/article/10.1007%2FJHEP07%282020%29124</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP07(2020)124" target="_blank" >10.1007/JHEP07(2020)124</a>

Result language
angličtina
Original language name
Observation of the associated production of a top quark and a Z boson in pp collisions at root s=13 TeV with the ATLAS detector
Original language description
Single top-quark production in association with a Z boson, where the Z boson decays to a pair of charged leptons, is measured in the trilepton channel. The proton-proton collision data collected by the ATLAS experiment from 2015 to 2018 at a centre-of-mass energy of 13 TeV are used, corresponding to an integrated luminosity of 139 fb(-1). Events containing three isolated charged leptons (electrons or muons) and two or three jets, one of which is identified as containing a b-hadron, are selected. The main backgrounds are from t (t) over barZ and diboson production. Neural networks are used to improve the background rejection and extract the signal. The measured cross-section for tl(+)l(-) q production, including non-resonant dilepton pairs with m(l+l-) > 30 GeV, is 97 +/- 13 (stat.) +/- 7 (syst.) fb, consistent with the Standard Model prediction.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10303 - Particles and field physics

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
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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