165 citations · 2.5k across the 85 of their papers we have counts for
4 papers · 1 filter
Leptoflavorgenesis: baryon asymmetry of the Universe from lepton flavor violation
Kyohei Mukaida, Kai Schmitz, Masaki Yamada
Charged-lepton flavor violation (CLFV) is a smoking-gun signature of physics beyond the Standard Model. The discovery of CLFV in upcoming experiments would indicate that CLFV proce…
Semiclassical analysis of axion-assisted and axion-driven pair production
Hiroyuki Kitamoto, Masaki Yamada
We study the pair production of fermions in a time dependent axion background with and without an electric background. We construct the adiabatic mode functions which incorporate t…
Cosmic Birefringence Triggered by Dark Matter Domination
Shota Nakagawa, Fuminobu Takahashi, Masaki Yamada
Cosmic birefringence is predicted if an axion-like particle (ALP) moves after the recombination. We show that this naturally happens if the ALP is coupled to the dark matter densit…
A natural and simple UV completion of the QCD axion model
Masaki Yamada, Tsutomu T. Yanagida
The novel PQ mechanism replaces the strong CP problem with some challenges in a model building. In particular, the challenges arise regarding i) the origin of an anomalous global s…