305 citations · 2.9k across the 49 of their papers we have counts for
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Equivalence Principle Violation in Vainshtein Screened Two-Body Systems
Takashi Hiramatsu, Wayne Hu, Kazuya Koyama +1
In massive gravity, galileon, and braneworld explanations of cosmic acceleration, force modifications are screened by nonlinear derivative self-interactions of the scalar field med…
Axion cosmology with long-lived domain walls
Takashi Hiramatsu, Masahiro Kawasaki, Ken'ichi Saikawa +1
We investigate the cosmological constraints on axion models where the domain wall number is greater than one. In these models, multiple domain walls attached to strings are formed,…
Production of dark matter axions from collapse of string-wall systems
Takashi Hiramatsu, Masahiro Kawasaki, Ken'ichi Saikawa +1
We analyze the spectrum of axions radiated from collapse of domain walls, which have received less attention in the literature. The evolution of topological defects related to the…