32 citations · 49 across the 2 of their papers we have counts for
6 papers · 1 filter
Axionic Mirage Mediation
Shuntaro Nakamura, Ken-ichi Okumura, Masahiro Yamaguchi
Although the mirage mediation is one of the most plausible mediation mechanisms of supersymmetry breaking, it suffers from two crucial problems. One is the μ-/B μ-problem and the s…
A Note on Polonyi Problem
Shuntaro Nakamura, Masahiro Yamaguchi
We reinvestigate the cosmological Polonyi problem in the case where the Polonyi mass is . Such a large supersymmetry breaking scale implies that the Polon…
Neutrino Masses and Mixing from Bilinear R-Parity Violation
Fumihiro Takayama, Masahiro Yamaguchi
Neutrino masses and mixing are generated in a supersymmetric standard model when R-parity is violated in bilinear mass terms. The mixing matrix among the neutrinos takes a restrict…
Fate of Gravitons in Warped Extra Dimension
Sanghyeon Chang, Masahiro Yamaguchi
Interaction of bulk gravitons to Standard Model particles is examined in the scenario of warped extra dimension. It is found that the length of the extra dimension is of physical i…
Axion in large extra dimension
Sanghyeon Chang, Shiro Tazawa, Masahiro Yamaguchi
We examine the axion model in the large extra dimensions scenario with TeV scale gravity. To obtain an intermediate-scale decay constant of the axion, the axion is assumed to live…
Stability of Gauge Hierarchy in Einstein Supergravity
Izumi Joichi, Yoshiharu Kawamura, Masahiro Yamaguchi
In supersymmetric grand unified theories, the gauge hierarchy achieved by a fine-tuning in the superpotential can be violated in the presence of soft breaking terms. We examine thi…