4 papers
Velocity-dependent self-interacting dark matter from thermal freeze-out and tests in direct detections
Lian-Bao Jia
A small fraction of millicharged dark matter (DM) is considered in the literature to give an interpretation about the enhanced 21-cm absorption at the cosmic dawn. Here we focus on…
Possible s-wave annihilation for MeV dark matter with the 21-cm absorption
Lian-Bao Jia, Xu Liao
The CMB observation sets stringent constraints on MeV dark matter (DM) annihilating into charged states/photons in s-wave, and the recent observation of the 21-cm absorption at the…
Could the 21-cm absorption be explained by the dark matter suggested by Be transitions?
Lian-Bao Jia, Xian-Jin Deng, Chang-Fu Liu
The stronger than expected 21-cm absorption was observed by EDGES recently, and another anomaly of Be transitions would be signatures of new interactions. These two issues may…
Dark photon portal dark matter with the 21-cm anomaly
Lian-Bao Jia
A strong absorption profile was reported by the EDGES Collaboration, which indicates the hydrogen gas being colder than expected. It could be signatures of non-gravitational intera…