Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-12-09
Phys.Rev.Lett.100:091804, 2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, 1 figure, references added, note added on effective superpotential mass terms generated upon U(1)' breaking
Scientific paper
10.1103/PhysRevLett.100.091804
We demonstrate that Dirac neutrino masses in the experimentally preferred range are generated within supersymmetric gauge extensions of the Standard Model with a generalized supersymmetry breaking sector. If the usual superpotential Yukawa couplings are forbidden by the additional gauge symmetry (such as a U(1)'), effective Dirac mass terms involving the "wrong Higgs" field can arise either at tree level due to hard supersymmetry breaking fermion Yukawa couplings, or at one-loop due to nonanalytic or "nonholomorphic" soft supersymmetry breaking trilinear scalar couplings. As both of these operators are naturally suppressed in generic models of supersymmetry breaking, the resulting neutrino masses are naturally in the sub-eV range. The neutrino magnetic and electric dipole moments resulting from the radiative mechanism also vanish at one-loop order.
Demir Durmus A.
Everett Lisa L.
Langacker Paul
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