Outputs (6)

Impact of semi-annihilation of ℤ3symmetric dark matter with radiative neutrino masses (2014)
Journal Article
Aoki, M., & Toma, T. (2014). Impact of semi-annihilation of ℤ3symmetric dark matter with radiative neutrino masses. Journal of Cosmology and Astroparticle Physics, 2014(09), Article 016. https://doi.org/10.1088/1475-7516/2014/09/016

We investigate a Bbb Z3 symmetric model with two-loop radiative neutrino masses. Dark matter in the model is either a Dirac fermion or a complex scalar as a result of an unbroken Bbb Z3 symmetry. In addition to standard annihilation processes, semi-a... Read More about Impact of semi-annihilation of ℤ3symmetric dark matter with radiative neutrino masses.

3.55 keV X-ray line signal from excited dark matter in radiative neutrino model (2014)
Journal Article
Okada, H., & Toma, T. (2014). 3.55 keV X-ray line signal from excited dark matter in radiative neutrino model. Physics Letters B, 737, 162-166. https://doi.org/10.1016/j.physletb.2014.08.046

We study an exciting dark matter scenario in a radiative neutrino model to explain the X-ray line signal at recently reported by XMN-Newton X-ray observatory using data of various galaxy clusters and Andromeda galaxy. We show that the required large... Read More about 3.55 keV X-ray line signal from excited dark matter in radiative neutrino model.

Two loop neutrino model and dark matter particles with global B−L symmetry (2014)
Journal Article
Baek, S., Okada, H., & Toma, T. (2014). Two loop neutrino model and dark matter particles with global B−L symmetry. Journal of Cosmology and Astroparticle Physics, 2014(06), Article 027. https://doi.org/10.1088/1475-7516/2014/06/027

We study a two loop induced seesaw model with global U(1)B−L symmetry, in which we consider two component dark matter particles. The dark matter properties are investigated together with some phenomenological constraints such as electroweak precision... Read More about Two loop neutrino model and dark matter particles with global B−L symmetry.

Radiative lepton model and dark matter with global U(1)′symmetry (2014)
Journal Article
Baek, S., Okada, H., & Toma, T. (2014). Radiative lepton model and dark matter with global U(1)′symmetry. Physics Letters B, 732, 85-90. https://doi.org/10.1016/j.physletb.2014.03.021

We propose a radiative lepton model, in which the charged lepton masses are generated at one-loop level, and the neutrino masses are induced at two-loop level. On the other hand, tau mass is derived at tree level since it is too heavy to generate rad... Read More about Radiative lepton model and dark matter with global U(1)′symmetry.

New interpretation of the recent result of AMS-02 and multi-component decaying dark matters with non-Abelian discrete flavor symmetry (2014)
Journal Article
Kajiyama, Y., Okada, H., & Toma, T. (2014). New interpretation of the recent result of AMS-02 and multi-component decaying dark matters with non-Abelian discrete flavor symmetry. The European Physical Journal C, 74(2), Article 2722. https://doi.org/10.1140/epjc/s10052-014-2722-9

Recently the AMS-02 experiment has released the data of positron fraction with a very small statistical error. Because of the small error, it is no longer easy to fit the data with single dark matter for a fixed diffusion model and dark matter profil... Read More about New interpretation of the recent result of AMS-02 and multi-component decaying dark matters with non-Abelian discrete flavor symmetry.

Lepton flavor violation in the scotogenic model (2014)
Journal Article
Toma, T., & Vicente, A. (2014). Lepton flavor violation in the scotogenic model. Journal of High Energy Physics, 2014(1), Article 160. https://doi.org/10.1007/jhep01%282014%29160

We investigate lepton flavor violation in the scotogenic model proposed by Ma in which neutrinos acquire non-zero masses at the 1-loop level. Although some works exist in this direction, they have mainly focused on the radiative decay ℓα → ℓβγ. Motiv... Read More about Lepton flavor violation in the scotogenic model.