5 papers
Searching for Axion-like particle Dark Matter with Time-domain Polarization: Constraints from a protoplanetary disk
Kanako Narita, Tomohiro Fujita, Ryo Tazaki +1
Axion-like particles (ALPs) can induce a birefringence effect that rotates the polarization angle of light, offering a probe of ultralight dark matter. We analyze archival near-inf…
Effective Field Theory of Chiral Gravitational Waves
Katsuki Aoki, Tomohiro Fujita, Ryodai Kawaguchi +1
When a (non-)Abelian gauge field acquires an isotropic background configuration during inflation, strong gravitational waves (GWs) with parity-violating polarization, known as chir…
An Effective Theory for Biased Tracers via the Boltzmann-Equation Approach
Tomohiro Fujita, Tomo Takahashi, Sora Yamashita
We develop an effective theory for biased tracers formulated at the level of the Boltzmann equation, providing a unified description of density and velocity bias. We introduce a ge…
Forecast constraints on the axion-photon coupling from interstellar medium heating
Makoto Amakawa, Tomohiro Fujita, Shinji Tsujikawa
In interstellar media characterized by a nonrelativistic plasma of electrons and heavy ions, we study the effect of axion dark matter coupled to photons on the dynamics of an elect…
Searches for ultralight vector and axion dark matter with KAGRA
Yuta Michimura, Takumi Fujimori, Hiroki Fujimoto +10
We have proposed using laser interferometric gravitational wave detectors to search for ultralight vector and axion dark matter. Vector dark matter can be probed through oscillatin…