4 papers
Reviving primordial black hole formation in slow first-order phase transitions
Wen-Yuan Ai, Ke-Pan Xie
Large curvature perturbations generated during slow first-order phase transitions are a promising source of primordial black holes. However, recent analyses suggested that the mech…
Dark matter in classically conformal theories: WIMP and supercooling
Ke-Pan Xie, Cheng-Hao Zhan
Beyond solving the hierarchy problem, classically conformal (CC) theories naturally accommodate dark matter (DM). In this work, we explore the CC gauge theory with a trip…
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…