Generating Majorana neutrino masses with loops

Geng, Chao-Qiang

doi:10.1142/S0217732315300189

Generating Majorana neutrino masses with loops

Chao-Qiang Geng
(
- CUPT, Chongqing and
- Taiwan, Natl. Tsing Hua U. and
- NCTS, Hsinchu
)

Aug 1, 2015

7 pages

Published in:

Mod.Phys.Lett.A 30 (2015) 1530018

Published: Aug 1, 2015

DOI:

10.1142/S0217732315300189

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Abstract: (World Scientific)

We give a review on neutrino models in which Majorana neutrino masses are generated radiatively through loop diagrams. In particular, we concentrate on the two-loop models which contain extra doubly charged singlet Φ and triplet Δ scalars beyond the Standard Model so that the new Yukawa Ψℓ̄RcℓR and effective Ψ±±W∓W∓ couplings can be induced. In these two-loop models, we find that the neutrino mass spectrum is a normal hierarchy and the rate of the neutrinoless double beta decay (0νββ) can be large as it is dominated by the short-distance tree contribution. In addition, by using the neutrino oscillation data and comparing with the global fitting result in the literature, we find a unique neutrino mass matrix and predict the Dirac and two Majorana CP phases to be 3(π − η)∕2, π + 3η∕2 and (3π − η)∕2 with η = 0.07π, respectively.

Majorana neutrino
neutrino mass
neutrinoless double beta decay
loop diagram
neutrino: model
neutrino: Majorana: mass
scalar particle: charge: 2
triplet: scalar
double-beta decay: (0neutrino)
neutrino: mass: hierarchy

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