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astro-ph.CO2025
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…
astro-ph.CO2025
Effective field theory of coupled dark energy and dark matter
Katsuki Aoki, Jose Beltrán Jiménez, Masroor C. Pookkillath +1
We formulate an effective field theory (EFT) of coupled dark energy (DE) and dark matter (DM) interacting through energy and momentum transfers. In the DE sector, we exploit the EF…