462 citations · 3.2k across the 66 of their papers we have counts for
3 papers · 2 filters
Constraining Light Gravitino Mass from Cosmic Microwave Background
Kazuhide Ichikawa, Masahiro Kawasaki, Kazunori Nakayama +2
We investigate the possibilities of constraining the light gravitino mass m_{3/2} from future cosmic microwave background (CMB) surveys. A model with light gravitino with the mass…
Axion isocurvature fluctuations with extremely blue spectrum
Shinta Kasuya, Masahiro Kawasaki
We construct an axion model for generating isocurvature fluctuations with blue spectrum, n_{iso}=2-4, which is suggested by recent analyses of admixture of adiabatic and isocurvatu…
Diffuse gamma-ray background and cosmic-ray positrons from annihilating dark matter
Masahiro Kawasaki, Kazunori Kohri, Kazunori Nakayama
We study the annihilating dark matter contribution to the extra-galactic diffuse gamma-ray background spectrum, motivated by the recent observations of cosmic-ray positron/electron…