296 citations · 1.1k across the 25 of their papers we have counts for
25 papers
Dark-pion dark matter beyond leading order: unitarized chiral dynamics
Yuki Watanabe
Dark pions are promising dark matter candidates, yet most analyses rely on leading-order (LO) chiral perturbation theory (ChPT). Motivated by the fact that, even for QCD pi-pi scat…
Self-Interacting Sub-GeV Dark Matter with Strong MeV Gamma-ray
Yu Watanabe
Sub-GeV dark matter (DM) with -channel resonant self-scattering provides a promising framework for addressing small-scale structure problems. However, models that also account f…
Unitarization of the Sommerfeld enhancement through the renormalization group
Yuki Watanabe
When a pair of dark matter particles interacts via a long-range force mediated by a light particle, their nonrelativistic annihilation cross section can be significantly enhanced -…
Scalar field stochastic dynamics in de Sitter spacetime from exact solutions of quantum deficient oscillators
Yuta Nasuda, Koki Tokeshi, Yuki Watanabe
The stochastic dynamics of a scalar field in de Sitter spacetime can be regarded as a non-perturbative diffusion process, to which exact distribution and correlation functions are…
Thermal Real Scalar Triplet Dark Matter
Taisuke Katayose, Shigeki Matsumoto, Satoshi Shirai +1
Real scalar triplet dark matter, which is known to be an attractive candidate for a thermal WIMP, is comprehensively studied paying particular attention to the Sommerfeld effect on…
Gravitational Wave from Axion-SU(2) Gauge Fields: Effective Field Theory for Kinetically Driven Inflation
Yuki Watanabe, Eiichiro Komatsu
Building on Weinberg's approach to effective field theory for inflation, we construct an effective Lagrangian for a pseudo scalar (axion) inflaton field with shift symmetry. In thi…