4 papers
Square Root Singularity in Boundary Reflection Matrix
J. D. Kim, I. G. Koh
Two-particle scattering amplitudes for integrable relativistic quantum field theory in 1+1 dimensions can normally have at most singularities of poles and zeros along the imaginary…
Fermion Scattering at a Phase Wave
Jae-weon Lee, In-guy Koh
We study fermion reflection at a phase wave which is formed during a bubble collision in a first order phase transition. We calculate the reflection and the transmission coefficien…
Galactic Halos As Boson Stars
Jae-weon Lee, In-guy Koh
We investigate the boson star with the self-interacting scalar field as a model of galactic halos. The model has slightly increasing rotation curves and allows wider ranges of the…
Inflation and Inverse Symmetry Breaking
Jae-weon Lee, In-guy Koh
An inflation model with inverse symmetry breaking of two scalar fields is proposed. Constraints on the parameters for a successful inflation are obtained. In general the inequality…