Dirac Vs. Majorana Neutrino Masses From a TeV Interval

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dc.creatorDiego, D.
dc.creatorQuiros, M.
dc.date2008-04-17
dc.date2008-05-09
dc.date.accessioned2026-07-07T11:49:57Z
dc.date.available2026-07-07T11:49:57Z
dc.descriptionWe investigate the nature (Dirac vs. Majorana) and size of left-handed neutrino masses in a supersymmetric five-dimensional model compactified in the interval [0,πR], where quarks and leptons are localized on the boundaries while the gauge and Higgs sectors propagate in the bulk of the fifth dimension. Supersymmetry is broken by Scherk-Schwarz boundary conditions and electroweak breaking proceeds through radiative corrections. Right-handed neutrinos propagate in the bulk and have a general five-dimensional mass M, which localizes the zero modes towards one of the boundaries, and arbitrary boundary terms. We have found that for generic boundary terms left-handed neutrinos have Majorana masses. However for specific boundary configurations left-handed neutrinos are Dirac fermions as the theory possesses a conserved global U(1) symmetry which prevents violation of lepton number. The size of neutrino masses depends on the localization of the zero-modes of right-handed neutrinos and/or the size of the five-dimensional neutrino Yukawa couplings. Left-handed neutrinos in the sub-eV range require either MR~10 or Yukawa couplings ~10^{-3}R, which make the five-dimensional theory perturbative up to its natural cutoff.
dc.description25 pages, 5 figures. v2: Added references
dc.identifierhttps://arxiv.org/abs/0804.2838
dc.identifierhttp://arxiv.org/abs/0804.2838
dc.identifierNucl.Phys.B805:148-167,2008
dc.identifierdoi:10.1016/j.nuclphysb.2008.07.019
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203415
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleDirac Vs. Majorana Neutrino Masses From a TeV Interval
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