162 citations · 2.1k across the 70 of their papers we have counts for
9 papers · 1 filter
QCD Axion Hybrid Inflation
Yuma Narita, Fuminobu Takahashi, Wen Yin
When the inflaton is coupled to the gluon Chern-Simons term for successful reheating, mixing between the inflaton and the QCD axion is generally expected given the solution of the…
Role of QCD in moduli stabilization during inflation and axion dark matter
Ryuichiro Kitano, Motoo Suzuki, Wen Yin
Ignorance of the initial condition for the axion dynamics in the early Universe has led us to consider an valued initial amplitude, and that prefers the decay constant, $F_a…
Can baryon asymmetry be explained by a large initial value before inflation?
Kai Murai, Fuminobu Takahashi, Masaki Yamada +1
We show that the baryon asymmetry of the Universe cannot be explained by a large initial value before inflation because it inevitably predicts correlated baryon isocurvature pertur…
A Novel Probe of Supersymmetry in Light of Nanohertz Gravitational Waves
Kai Murai, Wen Yin
A new era of exploring the early Universe may have begun with the recent strong evidence for the stochastic gravitational wave (GW) background from the data reported by NANOGrav, E…
Gravitational Waves from Domain Wall Collapse, and Application to Nanohertz Signals with QCD-coupled Axions
Naoya Kitajima, Junseok Lee, Kai Murai +2
We study for the first time the gravitational waves generated during the collapse of domain walls, incorporating the potential bias in the lattice simulations. The final stages of…
Indirect Detection of Decaying Dark Matter with High Angular Resolution: Case for axion search by IRCS at Subaru Telescope
Wen Yin, Kohei Hayashi
Recent advances in cosmic-ray detectors have provided exceptional sensitivities of dark matter with high angular resolution. Motivated by this, we present a comprehensive study of…
The QCD Axion: A Unique Player in the Axiverse with Mixings
Kai Murai, Fuminobu Takahashi, Wen Yin
In an axiverse with numerous axions, the cosmological moduli problem poses a significant challenge because the abundance of axions can easily exceed that of dark matter. The well-e…
Thermal production of cold "hot dark matter" around eV
Wen Yin
A very simple production mechanism of feebly interacting dark matter (DM) that rarely annihilates is thermal production, which predicts the DM mass around eV. This has been widely…
Hadrophobic Axion from GUT
Fuminobu Takahashi, Wen Yin
We propose a new kind of axion model derived from the Grand Unified Theory (GUT) based on . We demonstrate that, given a certain charge assignment and po…