Secluded Dark Matter Coupled to a Hidden CFT
Abstract
Models of secluded dark matter offer a variant on the standard WIMP picture and can modify our expectations for hidden sector phenomenology and detection. In this work we extend a minimal model of secluded dark matter, comprised of a U(1)'-charged dark matter candidate, to include a confining hidden-sector CFT. This provides a technically natural explanation for the hierarchically small mediator-scale, with hidden-sector confinement generating m_{gamma'}>0. Furthermore, the thermal history of the universe can differ markedly from the WIMP picture due to (i) new annihilation channels, (ii) a (potentially) large number of hidden-sector degrees of freedom, and (iii) a hidden-sector phase transition at temperatures T << M_{dm} after freeze out. The mediator allows both the dark matter and the Standard Model to communicate with the CFT, thus modifying the low-energy phenomenology and cosmic-ray signals from the secluded sector.
Cite
@article{arxiv.1203.6646,
title = {Secluded Dark Matter Coupled to a Hidden CFT},
author = {Benedict von Harling and Kristian L. McDonald},
journal= {arXiv preprint arXiv:1203.6646},
year = {2015}
}
Comments
~50p, 8 figs; v2 JHEP version