2 papers
astro-ph2000
Galaxy Distributions and Tsallis Statistical Mechanics
Akika Nakamichi, Izumi Joichi, Osamu Iguchi +1
Large-scale astrophysical systems are non-extensive due to their long-range force of gravity. Here we show an approach toward the statistical mechanics of such self-gravitating sys…
hep-ph1994
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…