Composite solution to the EDGES anomaly

@article{Mathur2022CompositeST,
  title={Composite solution to the EDGES anomaly},
  author={Anubha Mathur and Surjeet Rajendran and Harikrishnan Ramani},
  journal={Physical Review D},
  year={2022}
}
Subcomponent millicharged dark matter that cools baryons via Coulomb interactions has been invoked to explain the EDGES anomaly. However, this model is in severe tension with constraints from cosmology and stellar emissions. In this work, we consider the consequences of these millicharged particles existing in composite blobs. The relevant degrees of freedom at high temperature are minuscule elementary charges, which fuse at low temperatures to make up blobs of larger charge. These blobs serve… 
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