4 papers
Photon proliferation from multi-body dark matter annihilation
Shao-Ping Li, Ke-Pan Xie
Multi-body dark matter annihilation is commonly expected to be suppressed by higher-order couplings and phase-space factors, therefore being ignored thus far. We show that, however…
Asteroid-mass soliton as the dark matter-baryon coincidence solution
Shinya Kanemura, Shao-Ping Li, Ke-Pan Xie
Nontopological solitons formed during first-order phase transitions can serve as macroscopic dark matter candidates, with their stability ensured by a charge asymmetry traditionall…
Neutrinogenic CMB spectral distortions
Shao-Ping Li, Jens Chluba
Extra radiation injection after neutrino decoupling in the early Universe contributes to the effective number of neutrino species that can be constrained by the cosmic microwave ba…
Particle decay as asymptotic narrow parametric resonance
Shao-Ping Li
Parametric resonance can produce particles from oscillating scalar field, where an exponential growth of the particle number density can be developed. While it has been noticed tha…