3 papers
hep-ph2001
Symmetry Reduction, Gauge Transformation and Orbifold
Tetsuaki Kawamoto, Yoshiharu Kawamura
We study a mechanism of symmetry reduction in a higher-dimensional field theory upon orbifold compactification. Split multiplets appear unless all components in a multiplet of a sy…
hep-ph1999
On soft SUSY breaking parameters in string models with anomalous U(1) symmetry
Yoshiharu Kawamura
We study the magnitudes of soft SUSY breaking parameters in heterotic string models with anomalous U(1) symmetry. In most cases, D-term contribution to soft scalar masses is expect…
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…