Name: Kohei Kamada
 Institution: The University of Tokyo
 Title: Fate of Q balls in thermal potential
 Key Words: baryogenesis, Affleck Dine mechanism, Q balls, gravitational waves
 Abstract: In the context of Affleck-Dine mechanism of baryogenesis, non-topological solitons, Q balls, generally formed. Among many types of Q balls, those produced in thermal logarithmic potential have an interesting character. They transforms as the cosmic temperature decrease. In particular, they transforms from thick-wall type to thin-wall type. In this study, we evaluate their time evolution using lattice simulations.  we confirm that the Q ball transforms from the thick-wall type to the thin-wall type for a positive coefficient of radiative corrections to the mass term, as recently suggested.  Moreover, we find that the Q ball  finally ``melts down'' 
when the Q-ball solution disappears. We also discuss the effects of this phenomenon on the detectability of gravitational waves from the Q-ball formation.