Search for the production of a Higgs boson in association with a single top quark in pp collisions at SQUARE ROOTs = 13 TeV with the ATLAS detector

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10511555" target="_blank" >RIV/00216208:11320/25:10511555 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=CVhiUwMitW" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=CVhiUwMitW</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP10(2025)093" target="_blank" >10.1007/JHEP10(2025)093</a>

Result language
angličtina
Original language name
Search for the production of a Higgs boson in association with a single top quark in pp collisions at SQUARE ROOTs = 13 TeV with the ATLAS detector
Original language description
A search for the production of a Higgs boson in association with a single top quark, tH, is presented. The analysis uses proton-proton collision data corresponding to anintegrated luminosity of 140 fb−1 at a centre-of-mass energy of 13TeV, collected by the ATLASdetector at the LHC. The search targets Higgs-boson decays into b¯b, WW∗, ZZ∗, and τ τ ,accompanied by an isolated lepton (electron or muon) from the top-quark decay. Multivariatetechniques are employed to enhance the separation between signal and background processes.The observed signal strength, μtH, defined as the ratio between the measured cross-section andthe predicted Standard Model value, is μtH = 8.1 ± 2.6 (stat.) ± 2.0 (syst.). The significanceof the observed (expected) signal above the background-only expectation is 2.8 (0.4) standarddeviations. The corresponding observed (expected) upper limit at the 95% confidence level onthe tH cross-section is found to be 13.9 (6.1) times the value predicted by the Standard Model.An interpretation with an inverted sign of the top-quark Yukawa coupling is performed, and the signal strength and corresponding limit are reported.
Czech name
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Czech description
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Type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10300 - Physical sciences

Project
<a href="/en/project/EH22_008%2F0004632" target="_blank" >EH22_008/0004632: Fundamental constituents of matter through frontier technologies</a>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP) S - Specificky vyzkum na vysokych skolach I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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