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001-es BibID:	BIBFORM119979
035-os BibID:	(WoS)000456243300001 (Scopus)85060299407
Első szerző:	CMS Collaboration
Cím:	Search for heavy Majorana neutrinos in same-sign dilepton channels in proton-proton collisions at root{s} = 13 TeV / CMS Collaboration
Dátum:	2019
ISSN:	1126-6708 1029-8479
Megjegyzések:	A search is performed for a heavy Majorana neutrino (N), produced in leptonic decay of a W boson propagator and decaying into a W boson and a lepton, with the CMS detector at the LHC. The signature used in this search consists of two same-sign leptons, in any flavor combination of electrons and muons, and at least one jet. The data were collected during 2016 in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1). The results are found to be consistent with the expected standard model background. Upper limits are set in the mass range between 20 and 1600 GeV in the context of a Type-I seesaw mechanism, on \|V-eN\|(2), \|V-N\|(2), and \|VeNV *\|(2)/(\|V-eN\|(2)+\|V-N\|(2)), where V-N is the matrix element describing the mixing of N with the standard model neutrino of flavor = e, . For N masses between 20 and 1600 GeV, the upper limits on \|V-N\|(2) range between 2.3 x 10(-5) and unity. These are the most restrictive direct limits for heavy Majorana neutrino masses above 430 GeV.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Beyond Standard Model Hadron-Hadron scattering (experiments)
Megjelenés:	Journal of High Energy Physics. - 2019 : 1 (2019), p. 1-55. -
További szerzők:	Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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