Abstract
We show that a gauge singlet scalar , with a coupling to the Higgs doublet of the form and with the mass entirely generated by the Higgs expectation value, has a thermally generated relic density if . Remarkably, this is very similar to the range required in order for the self-interaction to account for self-interacting dark matter when is not much smaller than 1. The corresponding coupling is , implying that such scalars are very weakly coupled to the standard model sector.
- Received 5 July 2001
DOI:https://doi.org/10.1103/PhysRevLett.88.091304
©2002 American Physical Society