242 citations · 677 across the 11 of their papers we have counts for
11 papers
Hidden Monopole Dark Matter via Axion Portal and its Implications for Direct Detection Searches, Beam-Dump Experiments, and the Tension
Ryuji Daido, Shu-Yu Ho, Fuminobu Takahashi
Hidden monopole is a plausible dark matter candidate due to its stability, but its direct experimental search is extremely difficult due to feeble interactions with the standard mo…
Physics potential of the International Axion Observatory (IAXO)
E. Armengaud, D. Attie, S. Basso +88
We review the physics potential of a next generation search for solar axions: the International Axion Observatory (IAXO). Endowed with a sensitivity to discover axion-like particle…
Enhanced axion-photon coupling in GUT with hidden photon
Ryuji Daido, Fuminobu Takahashi, Norimi Yokozaki
We show that the axion coupling to photons can be enhanced in simple models with a single Peccei-Quinn field, if the gauge coupling unification is realized by a large kinetic mixin…
The ALP miracle revisited
Ryuji Daido, Fuminobu Takahashi, Wen Yin
We revisit the ALP miracle scenario where the inflaton and dark matter are unified by a single axion-like particle (ALP). We first extend our previous analysis on the inflaton dyna…
The sign of the dipole-dipole potential by axion exchange
Ryuji Daido, Fuminobu Takahashi
We calculate a dipole-dipole potential between fermions mediated by a light pseudoscalar, axion, paying a particular attention to the overall sign. While the sign of the potential…
The ALP miracle: unified inflaton and dark matter
Ryuji Daido, Fuminobu Takahashi, Wen Yin
We propose a scenario where both inflation and dark matter are described by a single axion-like particle (ALP) in a unified manner. In a class of the minimal axion hilltop inflatio…
Gauge Coupling Unification with Hidden Photon, and Minicharged Dark Matter
Ryuji Daido, Fuminobu Takahashi, Norimi Yokozaki
We show that gauge coupling unification is realized with a greater accuracy in the presence of a massless hidden photon which has a large kinetic mixing with hypercharge. We solve…
Dark Matter in Axion Landscape
Ryuji Daido, Takeshi Kobayashi, Fuminobu Takahashi
If there are a plethora of axions in nature, they may have a complicated potential and create an axion landscape. We study a possibility that one of the axions is so light that it…
Level Crossing between QCD Axion and Axion-Like Particle
Ryuji Daido, Naoya Kitajima, Fuminobu Takahashi
We study a level crossing between the QCD axion and an axion-like particle, focusing on the recently found phenomenon, the axion roulette, where the axion-like particle runs along…
Domain Wall Formation from Level Crossing in the Axiverse
Ryuji Daido, Naoya Kitajima, Fuminobu Takahashi
We point out that domain wall formation is a more common phenomenon in the Axiverse than previously thought. Level crossing could take place if there is a mixing between axions, an…
Axion domain wall baryogenesis
Ryuji Daido, Naoya Kitajima, Fuminobu Takahashi
We propose a new scenario of baryogenesis, in which annihilation of axion domain walls generates a sizable baryon asymmetry. Successful baryogenesis is possible for a wide range of…