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Active Dirac Neutrinos via SU(2)_L Doublets in 5d

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arxiv 1601.05265 v2 pith:MMPSIQE2 submitted 2016-01-20 hep-ph

Active Dirac Neutrinos via SU(2)_L Doublets in 5d

Yukihiro Fujimoto , K. Hasegawa , Tomoaki Nagasawa , Kenji Nishiwaki , Makoto Sakamoto , Kentaro Tatsumi This is my paper
classification hep-ph
keywords massactivediracgaugemechanismneutrinoneutrinosallows
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We propose a new mechanism to generate minuscule active neutrino masses in a five-dimensional~(5d) spacetime of an interval without introducing $SU(2)_L$ singlet neutrinos. Under asymmetric boundary conditions on the two end points, a bulk mass for a 5d fermion allows a Dirac particle with a tiny mass eigenvalue. Implementing this mechanism, which provides us a new tool for building neutrino mass models, to the standard model gauge structure is possible when all the gauge bosons and the Higgs boson are localized on one of the branes.

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  1. Conjugate Boundary Conditions, Kaluza-Klein Fermions, and an Extended Seesaw Model

    hep-th 2026-07 conditional novelty 6.0

    CBC zero modes are Majorana while free nonzero KK modes form Dirac fermions via accidental U(1); an extended seesaw then sources LNV from bulk CBC-chiral interactions rather than the Majorana mass.