5 papers
Multi-Field Effects on Scalar Production in Stars
Yasuhiro Yamamoto, Koichi Yoshioka
This paper studies the dynamics of scalar particle production, focusing on the presence of multiple fields and couplings in the medium. The interplay of various fields and coupling…
Two-field inflation from one complex scalar with symmetry breaking
Yoshihiko Abe, Toshimasa Ito, Koichi Yoshioka
We study two-field inflation derived from a single complex scalar field with a nonzero vacuum expectation value. The dynamics of inflation are governed by two parameters, the vacuu…
Mass Matrices in E6 Unification
M. Bando, T. Kugo, K. Yoshioka
We study a supersymmetric E6 grand unified model in which the SU(5) 5^* components are twisted in the third generation 27. Supplementing the adjoint Higgs field to a model analyzed…
Brane fluctuations and suppression of Kaluza-Klein mode couplings
M. Bando, T. Kugo, T. Noguchi +1
In higher dimensional models where the gauge and gravity fields live in the bulk and the matter fields only in a brane, we point out the importance of the brane (transverse) coordi…
Quark and Lepton Mass Matrix in an Asymptotically Non-Free Theory
M. Bando, J. Sato, K. Yoshioka
We analyze fermion mass-matrix structure in an asymptotically non-free model with 4 + 1bar generations. The texture at the GUT scale is uniquely determined by supposing that the ma…