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001-es BibID:	BIBFORM119266
035-os BibID:	(Scopus)85136307960 (WoS)000826915800001
Első szerző:	CMS Collaboration
Cím:	Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at root{s} = 13 TeV / CMS collaboration
Dátum:	2022
ISSN:	1126-6708 1029-8479
Megjegyzések:	A search for heavy neutral leptons (HNLs), the right-handed Dirac or Majorana neutrinos, is performed in final states with three charged leptons (electrons or muons) using proton-proton collision data collected by the CMS experiment at root{s} = 13 TeV at the CERN LHC. The data correspond to an integrated luminosity of 138 fb^-1. The HNLs could be produced through mixing with standard model neutrinos [nu]. For small values of the HNL mass (<20 GeV) and the square of the HNL-[nu] mixing parameter (10^-7-10^-2), the decay length of these particles can be large enough so that the secondary vertex of the HNL decay can be resolved with the CMS silicon tracker. The selected final state consists of one lepton emerging from the primary proton-proton collision vertex, and two leptons forming a displaced, secondary vertex. No significant deviations from the standard model expectations are observed, and constraints are obtained on the HNL mass and coupling strength parameters, excluding previously unexplored regions of parameter space in the mass range 1-20 GeV and squared mixing parameter values as low as 10^-7.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Beyond Standard Model Hadron-Hadron Scattering
Megjelenés:	Journal of High Energy Physics. - 2022 : 7 (2022), p. 1-55. -
További szerzők:	Bartók Márton (fizikus) 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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