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001-es BibID:	BIBFORM116080
035-os BibID:	(cikkazonosító)137803 (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 / Tumasyan, A., Adam, W., Andrejkovic, J.W., Raics P., Ujvari B.
Dátum:	2023
ISSN:	0370-2693
Megjegyzések:	Results are presented of a search for a heavy Majorana neutrino [Formula presented] decaying into two same-flavor leptons ? (electrons or muons) and a quark-pair jet. A model is considered in which the [Formula presented] is an excited neutrino in a compositeness scenario. The analysis is performed using a sample of proton-proton collisions at s=13TeV recorded by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 138fb?1. The data are found to be in agreement with the standard model prediction. For the process in which the [Formula presented] is produced in association with a lepton, followed by the decay of the [Formula presented] 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 [Formula presented] mass [Formula presented] and the compositeness scale ?. For this model the data exclude the existence of [Formula presented] ([Formula presented]) for [Formula presented] below 6.0 (6.1) TeV, at the limit where [Formula presented] is equal to ?. For [Formula presented], 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 [Formula presented] 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:	Tumasyan, Armen Adam, Wolfgang Andrejkovic, J.W. Raics Péter (1944-) (fizikus) Ujvári Balázs (1977-) (fizikus)
Pályázati támogatás:	NKFIH K 124845 Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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