Two Higgs doublets respect a mirror symmetry with spontaneous violation so that their vacuum expectation values can realize a small difference. Under this symmetry, three newly introduced right-handed neutrinos rather than the standard model fermions perform an odd transformation. Accordingly the neutrino masses and the charged fermion masses respectively are proportional to the difference and sum of the vacuum expectation values of two Higgs doublets. From a phenomenological perspective, such nearly degenerate Higgs doublets with large cancellation are equivalent to a Dirac seesaw mechanism with high suppression.Comment: 5 pages. More clarifications on the related mirror symmetry are added. Typos are correcte
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We consider the low scale ($10$ - $100$ TeV) left-right symmetric model with "naturally" small neutr...
A mechanism for generating massive but naturally light Dirac neutrinos is proposed. It involves comp...
Dirac neutrinos with lepton-number-violating interactions can give rise to a new leptogenesis mechan...
We extend the visible content of the standard model (SM) with a hidden sector composed of three righ...
The $SU(3)_c^{}\times SU(2)_L^{} \times U(1)_Y^{}$ standard model is extended by a $U(1)_{B-L}^{}$ g...
Many studies have been made on extensions of the standard model with B−L gauge symmetry. The additio...
We study a model in which lepton number violation is solely triggered by a dimension 4 hard breaking...
A simple and economical extension of the minimal standard electroweak gauge model (without right-han...
A simple extension of the standard model is proposed in which all the three generations of neutrinos...
We show that under a new U(1) gauge symmetry, which is non-anomalous in the presence of one ``right-...
We present a way of protecting a Dirac fermion interacting with a scalar (Higgs) field from getting ...
AbstractWe propose a simple model for Dirac neutrinos where the smallness of neutrino mass follows f...
[[abstract]]We study a model in which lepton number violation is solely triggered by a dimension 4 h...
Naturally light singlet neutrinos which mix with the usual doublet neutrinos are possible if the sup...
AbstractWe extend the scalar sector of the neutrinophilic two-Higgs-doublet model, where small masse...
We consider the low scale ($10$ - $100$ TeV) left-right symmetric model with "naturally" small neutr...
A mechanism for generating massive but naturally light Dirac neutrinos is proposed. It involves comp...
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