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001-es BibID:	BIBFORM123713
035-os BibID:	(Scopus)85196056143
Első szerző:	Hayrapetyan, A.
Cím:	Search for Baryon Number Violation in Top Quark Production and Decay Using Proton-Proton Collisions at root{s} = 13 TeV / A. Hayrapetyan, CMS Collaboration
Dátum:	2024
ISSN:	0031-9007
Megjegyzések:	A search is presented for baryon number violating interactions in top quark production and decay. The analysis uses data from proton-proton collisions at a center-of-mass energy of 13 TeV, collected with the CMS detector at the LHC with an integrated luminosity of 138fb-1. Candidate events are selected by requiring two oppositely charged leptons (electrons or muons) and exactly one jet identified as originating from a bottom quark. Multivariate discriminants are used to separate the signal from the background. No significant deviation from the standard model prediction is observed. Upper limits are placed on the strength of baryon number violating couplings. For the first time the production of single top quarks via baryon number violating interactions is studied. This allows the search to set the most stringent constraints to date on the branching fraction of the top quark decay to a lepton, an up-type quark (u or c), and a down-type quark (d, s, or b). The results improve the previous bounds by 3 to 6 orders of magnitude based on the fermion flavor combination of the baryon number violating interactions.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk proton
Megjelenés:	Physical Review Letters. - 132 : 24 (2024), p. 1-19. -
További szerzők:	Bartók Márton (fizikus) Raics Péter (1944-) (fizikus) Ujvári Balázs (1977-) (fizikus) Zilizi Gyula (1965-) (fizikus) CMS Collaboration
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