Measurements of top-quark pair spin correlations in the e mu channel at <mml:msqrt>s</mml:msqrt>=13 TeV using pp collisions in the ATLAS detector
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F20%3A73602323" target="_blank" >RIV/61989592:15310/20:73602323 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21220/20:00346699 RIV/68407700:21340/20:00346699 RIV/68407700:21670/20:00346699 RIV/00216208:11320/20:10423588
Result on the web
<a href="https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-020-8181-6" target="_blank" >https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-020-8181-6</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1140/epjc/s10052-020-8181-6" target="_blank" >10.1140/epjc/s10052-020-8181-6</a>
Alternative languages
Result language
angličtina
Original language name
Measurements of top-quark pair spin correlations in the e mu channel at <mml:msqrt>s</mml:msqrt>=13 TeV using pp collisions in the ATLAS detector
Original language description
A measurement of observables sensitive to spin correlations in tt<overbar></mml:mover> production is presented, using 36.1 fb-1 of pp collision data at <mml:msqrt>s</mml:msqrt>=13 TeV recorded with the ATLAS detector at the Large Hadron Collider. Differential cross-sections are measured in events with exactly one electron and one muon with opposite-sign electric charge as a function of the azimuthal opening angle and the absolute difference in pseudorapidity between the electron and muon candidates in the laboratory frame. The azimuthal opening angle is also measured as a function of the invariant mass of the t<mml:mover accent="true">t<mml:mo stretchy="false"><overbar></mml:mover> system. The measured differential cross-sections are compared to predictions by several NLO Monte Carlo generators and fixed-order calculations. The observed degree of spin correlation is somewhat higher than predicted by the generators used. The data are consistent with the prediction of one of the fixed-order calculations at NLO, but agree less well with higher-order predictions. Using these leptonic observables, a search is performed for pair production of supersymmetric top squarks decaying into Standard Model top quarks and light neutralinos. Top squark masses between 170 and 230 GeV are largely excluded at the 95% confidence level for kinematically allowed values of the neutralino mass.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - 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
Result continuities
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)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
EUROPEAN PHYSICAL JOURNAL C
ISSN
1434-6044
e-ISSN
—
Volume of the periodical
80
Issue of the periodical within the volume
8
Country of publishing house
DE - GERMANY
Number of pages
43
Pages from-to
"754-1"-"754-43"
UT code for WoS article
000565271700001
EID of the result in the Scopus database
2-s2.0-85090083990