arXiv subjects

Morimitu Tanimoto

Publications and source records attributed to Morimitu Tanimoto.

3 recordsLinked to original sources

arXiv2004

Symmetric Mass Matrix with Two Zeros in SUSY SO(10) GUT, Lepton Flavor Violations and Leptogenesis

We study the symmetric 2-zero texture of the neutrino mass matrix, which is obtained from the symmetric Dirac neutrino mass matrix with 2-zeros and right-handed Majorana neutrino mass matrix with the general form via the see-saw mechanism, for the SUSY SO(10) GUT model including the Pati-Salam symmetry. We show that the only one texture in our model, having degenerate mass spectrum for the 1st and 2nd generation of right-handed Majorana neutrino, can simultaneously explain the current neutrino experimental data, lepton flavor violating processes and baryon asymmetry of the Universe. Within such a framework, the predicted values of the light and heavy Majorana neutrino masses, together with $|U_{e3}|$, $J_{\rm CP}$ and $|< M_{ee} >|$, are almost uniquely determined.

hep-ph↗

arXiv2003

Can Symmetric Texture reproduce Neutrino Bi-large Mixing?

We study the symmetric texture of geometric form with 2-zeros to see if it is consistent with the presently-known neutrino masses and mixings. In the neutrino mass matrix elements we obtain numerically the allowed region of the parameters including CP violating phases, which can reproduce the present neutrino experiment data. The result of this analysis dictates the narrow region for the GUT model including Pati-Salam symmetry with texture zeros to be consistent with the experimental data. The $|U_{e3}|$ and $J_{CP}$ are also predicted in such models.

hep-ph↗

arXiv1996

U(3)-Family Nonet Higgs Boson and its Phenomenology

In a model where quark and lepton masses and family-mixings are caused not by a variety of Yukawa couplings $y_{ij}$ ($i,j=1,2,3$: family indices) with one vacuum expectation value (VEV) $v=\langleϕ_L^0\rangle_0$, but by a variety of VEV's of a U(3)-family nonet Higgs boson $ϕ_L$, $v_{i}^j=\langleϕ_{L i}^{0j}\rangle_0$, with a single coupling constant, the following problems are investigated: what constraints on the Higgs potential are imposed in order to provide realistic quark and lepton mass spectra and mixings and what constraints on the Higgs boson masses are required in order to suppress unwelcome flavor-changing neutral current effects. Lower bounds of the physical Higgs boson masses of $ϕ_L$ are deduced from the present experimental data and new physics from the present scenario is speculated.

hep-ph↗