4 papers
Charge distribution of the gauge-mediation type Q ball
Shinta Kasuya, Masahiro Kawasaki
We numerically study the formation of the gauge-mediation type Q balls in the logarithmic square potential on three-dimensional lattices. We obtain the broad charge distribution of…
Numerical simulation of the stochastic formalism including non-Markovianity
Masahiro Kawasaki, Tomotaka Kuroda
We numerically investigate stochastic dynamics in cosmology by solving Langevin equations for Infrared (IR) modes with stochastic noises generated by Ultraviolet (UV) modes at the…
Formation of primordial black holes through Q-balls
Shinta Kasuya, Masahiro Kawasaki, Alexander Kusenko +1
We study the primordial black hole (PBH) formation from Q-balls that are non-topological solitons in scalar field theories. We develop a formula for calculating the density perturb…
MeV gamma rays from Q-ball decay
Shinta Kasuya, Masahiro Kawasaki, Naomi Tsuji
We study the supersymmetric Q balls which decay at present and find that they create a distinctive spectrum of gamma rays at around O(10) MeV. The charge of the Q ball is lepton nu…