Freeze-in self-interacting dark matter in warped extra dimension

作者：Li, Shao-Ping; Zhang, Xin^*

来源：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics , 2021, 820: 136566.

DOI：10.1016/j.physletb.2021.136566

• FERMION MASSES
• MIXINGS

A classically scale-invariant scalar singlet can be a MeV-scale dark matter, with a feeble Higgs portal coupling at O(10-10). Besides, an O(0.1) self-interaction coupling could further serve to alleviate the small-scale problems in the Universe. We show that, such a dark matter candidate can naturally arise in the warped extra dimension, with the huge span of parameter space predicted well within O(1) fundamental parameters.