Neutrinoless double beta decay

Xem 1-4 trên 4 kết quả Neutrinoless double beta decay

Summary of the PhD thesis: Construction and investigation of a neutrino mass model with A4 flavour symmetry by pertubation method

The thesis is devoted to constructing and evaluating versions of the SM extended with an A4 symmetry to explain some of the problems of neutrino physics. Within these extended models, the results on neutrino masses and mixing, derived by the perturbation method, are very closed to the global fit. In two models, a relation between the Dirac CPV phase and the mixing angles is established. In particular, the models predict Dirac CPV phase δCP and effective mass of neutrinoless double beta decay jhmeeij in good agreement with the current experimental data.

26p capheviahe27 23-02-2021 17 3 Download

Neutrinoless double beta decay in the economical 3-3-1 model

Possible contributions to neutrinoless double beta (ββ)0ν decay in the economical 3-3-1 model are discussed. We show that the (ββ)0ν decay in this model is due to both sources— Majorana hMν iL and Dirac hMν iD neutrino masses. If the mixing angle between charged gauge bosons, the standard model W and bilepton Y is in range of the ratio of neutrino masses hMν iL/hMν iD, then both the Majorana and Dirac masses simultaneously give contributions dominant to the decay. As results, constraints on the bilepton mass are also given.

11p nguyenxuankha_bevandan 14-08-2020 14 1 Download

Inverted neutrino mass hierarchy and mixing in the zee babu model

We show that the neutrino mass matrix of the Zee-Babu model is able to fit the recent data on neutrino masses and mixing with non-zero θ13 in the inverted neutrino mass hierarchy. The results show that the Majorana phases are equal to zero and the Dirac phase (δ) is predicted to either 0 or π, i. e, there is no CP violation in the Zee-Babu model at the two loop level. The effective mass governing neutrinoless double beta decay and the sum of neutrino masses are consistent with the recent analysis

8p thuyliebe 09-10-2018 27 0 Download
Leptogenesis in A4 flavor symmetry model by renormalization group evolution

As a result, the flavored leptogenesis is successfully realized. We also investigate how the effective light neutrino mass |hmeei| associated with neutrinoless double beta decay can be predicted by imposing the experimental data on the low energy observables. We find a link between the leptogenesis and the neutrinoless double beta decay characterized by |hmeei| through a high energy CP phase φ, which is correlated with the low energy Majorana CP phases.

11p thuyliebe 09-10-2018 21 0 Download