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arXiv · 1809.06039

Inverse seesaw model with large $SU(2)_L$ multiplets and natural mass hierarchy

Takaaki Nomura·Hiroshi Okada
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Abstract

We propose an inverse seesaw model with large $SU(2)_L$ multiplet fields which realizes natural mass hierarchies among neutral fermions. Here, lighter neutral fermion mass matrices are induced via two suppression mechanisms; one is small vacuum expectation value of $SU(2)_L$ triplet required by rho parameter constraint and the other is generation of Majorana mass term of extra singlet fermions at one-loop level. To realize the loop masses, we impose $Z_2$ symmetry which also guarantees stability of a dark matter candidate. Furthermore, we discuss anomalous magnetic moment and collider physics from interactions of large multiplet fields.

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Takaaki Nomura, Hiroshi Okada. 2019-04-04. Inverse seesaw model with large $SU(2)_L$ multiplets and natural mass hierarchy. https://doi.org/10.1016/j.physletb.2019.04.006

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