Kai Murai

activity

20192026

most citedEMPRESS. VIII. A New Determination of Primordial He Abundance with Extremely Metal-Poor Galaxies: A Suggestion of the Lepton Asymmetry and Implications for the Hubble Tension

104 citations · 676 across the 37 of their papers we have counts for

collaborators

Showing 2025Show all

2 papers · 1 filter

hep-ph2025

Resonant production of sterile neutrino dark matter with a refined numerical scheme

Kentaro Kasai, Masahiro Kawasaki, Kai Murai

The existence of a large primordial neutrino asymmetry is an intriguing possibility, both observationally and theoretically. Such an asymmetry can lead to the resonant production o…

astro-ph.GA2025

EMPRESS. XV. A New Determination of the Primordial Helium Abundance Suggesting a Moderately Low $Y_{P}$ Value

Hiroto Yanagisawa, Masami Ouchi, Akinori Matsumoto +18

We present a new constraint on the primordial helium abundance, $Y_{P}$ , based on Subaru observations. A major source of uncertainty in previous $Y_{P}$ determination…

Resonant production of sterile neutrino dark matter with a refined numerical scheme

EMPRESS. XV. A New Determination of the Primordial Helium Abundance Suggesting a Moderately Low YP​ Value

EMPRESS. XV. A New Determination of the Primordial Helium Abundance Suggesting a Moderately Low $Y_{P}$ Value