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001-es BibID:	BIBFORM116080
035-os BibID:	(Scopus)85165710255 (WoS)001038664500001
Első szerző:	CMS Collaboration
Cím:	Search for a heavy composite Majorana neutrino in events with dilepton signatures from proton-proton collisions at root{s} = 13 teV / CMS Collaboration
Dátum:	2023
ISSN:	0370-2693
Megjegyzések:	Results are presented of a search for a heavy Majorana neutrino N decaying into two same-flavor leptons (electrons or muons) and a quark-pair jet. A model is considered in which the N is an excited neutrino in a compositeness scenario. The analysis is performed using a sample of proton-proton collisions at & RADIC;s = 13 TeV recorded by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 138 fb-1. The data are found to be in agreement with the standard model prediction. For the process in which the N is produced in association with a lepton, followed by the decay of the N to a same-flavor lepton and a quark pair, an upper limit at 95% confidence level on the product of the cross section and branching fraction is obtained as a function of the N mass mN and the compositeness scale. For this model the data exclude the existence of Ne (N & mu;) for mN below 6.0 (6.1) TeV, at the limit where mN is equal to. For mN N 1 TeV, values of less than 20 (23) TeV are excluded. These results represent a considerable improvement in sensitivity, covering a larger parameter space than previous searches in pp collisions at 13 TeV.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk CMS Composite fermions Heavy leptons LHC
Megjelenés:	Physics Letters B. - 843 (2023), p. 1-25. -
További szerzők:	Bartók Márton (fizikus) Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Ujvári Balázs (1977-) (fizikus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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