7 papers
Calculation of HELAS amplitudes for QCD processes using graphics processing unit (GPU)
K. Hagiwara, J. Kanzaki, N. Okamura +2
We use a graphics processing unit (GPU) for fast calculations of helicity amplitudes of quark and gluon scattering processes in massless QCD. New HEGET ({\bf H}ELAS {\bf E}valuatio…
Generic Relations of Flavor Mixings between Leptons and Quarks in SU(5)
N. Okamura, M. Tanimoto
We have studied implications of the generic lopsided mass matrix of the charged leptons by taking the SU(5) GUT relation in the nearest-neighbor interaction (NNI) basis. We have fo…
The effects of Majorana phases in three-generation neutrinos
N. Haba, Y. Matsui, N. Okamura
Neutrino-oscillation solutions for the atmospheric neutrino anomaly and the solar neutrino deficit can determine the texture of the neutrino mass matrix according to three types of…
Analytic Solutions to the RG Equations of the Neutrino Physical Parameters
N. Haba, Y. Matsui, N. Okamura
In the case of two generation neutrinos, the energy-scale dependence of the lepton-flavor mixing matrix with Majorana phase can be governed by only one parameter r, which is the ra…
The effect of Majorana phase in degenerate neutrinos
N. Haba, Y. Matsui, N. Okamura +1
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 pla…
Energy-Scale Dependence of the Lepton-Flavor-Mixing Matrix
N. Haba, Y. Matsui, N. Okamura +1
We study an energy-scale dependence of the lepton-flavor-mixing matrix in the minimal supersymmetric standard model with the effective dimension-five operators which give the masse…