Advanced search    

Search: authors:"Masaki Sugiura"

4 papers found.
Use AND, OR, NOT, +word, -word, "long phrase", (parentheses) to fine-tune your search.

Fermion Mass Generation in the D-Dimensional Thirring Model as a Gauge Theory

Based on the Schwinger-Dyson (SD) equation, the fermion mass generation is studied further in the D(2 ≻ D ≻ 4)-dimensional Thirring model as a gauge theory previously proposed. Using a certain approximation on the kernel, we analytically obtaine explicit form of the dynamical mass of the fermion and the critical line in (N, 1/g) space, where N is the number of fermions and g is the ...

Renormalization Group Analysis of Large Lepton Flavor Mixing and the Neutrino Mass

The Superkamiokande experiment suggests large flavor mixing between νµ and ντ. We show that both the second and third generation neutrino masses are larger than O(0.1 eV)when the mixing angle receives significant corrections from the renormalization group equation (RGE). This implies that this mixing angle must be small at the right-handed neutrinos' decoupling scale when the ...

The Effect of Majorana Phase in Degenerate Neutrinos

There are physical Majorana phases in the lepton flavor mixing matrix when neutrinos are Majorana fermions. In the case of two degenerate neutrinos, the physical Majorana phase plays a crucial role in the stability of the maximal flavor mixing between the second and the third generations with respect to quantum corrections. The physical Majorana phase of π guarantees that the ...

Thirring Model as a Gauge Theory

We reformulate the Thirring model in D(2 ≤D ≪ 4) dimensions as a gauge theory by introducing U(1) hidden local symmetry (HLS) and study the dynamical mass generation of the fermion through the Schwinger-Dyson (SD) equation. By virtue of such a gauge symmetry we can greatly simplify the analysis of the SD equation by taking the most appropriate gauge (“nonlocal gauge”) for the HLS. ...