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…
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…
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…
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…
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…