104 citations · 676 across the 37 of their papers we have counts for
5 papers · 1 filter
Anisotropies in Cosmological 21 cm Background by Oscillons/I-balls of Ultra-light Axion-like Particle
Masahiro Kawasaki, Kazuyoshi Miyazaki, Kai Murai +2
Ultra-light axion-like particle (ULAP) with mass has recently been attracting attention as a possible solution to the small-scale crisis. ULAP forms…
Free Streaming Length of Axion-Like Particle After Oscillon/ I-ball Decays
Kaname Imagawa, Masahiro Kawasaki, Kai Murai +2
Axion-like particles (ALPs) are pseudoscalar bosons predicted by string theory. The ALPs have a shallower potential than a quadratic one, which induces the instability and can form…
SU()-natural inflation
Tomohiro Fujita, Kyohei Mukaida, Kai Murai +1
We study SU() gauge fields that couple to the inflaton through the Chern-Simons term. We provide a general procedure to construct homogeneous, isotropic, and attractor solutions…
Gravitational wave trispectrum in the axion-SU(2) model
Tomohiro Fujita, Kai Murai, Ippei Obata +1
We study the trispectrum of the gravitational waves (GWs) generated through the dynamics of an axionic spectator field and SU(2) gauge fields during inflation. In non-Abelian gauge…
Strong clustering of primordial black holes from Affleck-Dine mechanism
Masahiro Kawasaki, Kai Murai, Hiromasa Nakatsuka
Primordial black hole (PBH) is a fascinating candidate for the origin of binary merger events observed by LIGO-Virgo collaboration. The spatial distribution of PBHs at formation is…