Speaker
Shunsuke Neda
(ICRR University of Tokyo)
Description
Non-topological solitons can generate sizable Poisson density fluctuations, which grow during an early matter-dominated era and lead to primordial black hole (PBH) formation. Previous studies of this scenario assumed a monochromatic soliton mass distribution and did not fully address PBH formation from perturbations generated inside the horizon. In this work, we develop a general framework for evaluating density perturbations from a soliton mass distribution and clarify the collapse condition for sub-horizon perturbations during an early matter-dominated era. Applying the formalism to gauge-mediated Q-balls with a lattice-simulated charge distribution, we show that PBHs can constitute all dark matter.
Authors
Prof.
Alexander Kusenko
(UCLA)
Prof.
Masahiro Kawasaki
(Kavli IPMU)
Shinta Kasuya
(Kanagawa University)
Shunsuke Neda
(ICRR University of Tokyo)