Self-interacting dark matter implied by nano-Hertz gravitational waves
Self-interacting dark matter implied by nano-Hertz gravitational waves
The self-interacting dark matter (SIDM) paradigm offers a potential solution to the small-scale structure problems faced by collisionless cold dark matter. This framework incorporates self-interactions among dark matter particles, typically mediated by a particle with a MeV-scale mass. Recent evidences of nano-Hertz gravitational waves from pulsar timing arrays (PTAs) such …