Search for flavour-changing neutral tqH interactions with H -> γγ in pp collisions at root s=13 TeV using the ATLAS detector

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F23%3A00373971" target="_blank" >RIV/68407700:21220/23:00373971 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21240/23:00373971 RIV/68407700:21340/23:00373971 RIV/68407700:21670/23:00373971
Result on the web
<a href="https://doi.org/10.1007/JHEP12(2023)195" target="_blank" >https://doi.org/10.1007/JHEP12(2023)195</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP12(2023)195" target="_blank" >10.1007/JHEP12(2023)195</a>

Result language
angličtina
Original language name
Search for flavour-changing neutral tqH interactions with H -> γγ in pp collisions at root s=13 TeV using the ATLAS detector
Original language description
A search for flavour-changing neutral interactions involving the top quark, the Higgs boson and an up-type quark q ( q = c, u) is presented. The proton-proton collision data set used, with an integrated luminosity of 139 fb(-1), was collected at root s = 13TeV by the ATLAS experiment at the Large Hadron Collider. Both the decay process t -> qH in tt production and the production process pp. tH, with the Higgs boson decaying into two photons, are investigated. No significant excess is observed and upper limits are set on the t. cH and the t. uH branching ratios of 4.3x10(-4) and 3.8x10(-4), respectively, at the 95% confidence level, while the expected limits in the absence of signal are 4.7x10(-4) and 3.9x10(-4). Combining this search with ATLAS searches in the H. t+ t- and H. b <overline> b final states yields observed (expected) upper limits on the t -> cH branching ratio of 5.8 x 10(-4) (3.0 x 10(-4)) at the 95% confidence level. The corresponding observed (expected) upper limit on the t -> uH branching ratio is 4.0 x 10(-4) (2.4 x 10(-4)).
Czech name
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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
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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
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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