Abstract
One generic possibility for the origins of dark matter is its production from an internally thermalized hidden sector, with little to no direct involvement of the Standard Model. Any theory that invokes such a thermal dark radiation bath has to address the question of how this dark radiation bath was initially populated in the early universe. Here, we study how the simplest and most robust cosmic histories for minimal hidden sectors inform the signals of hidden sector dark matter, and present some new targets for direct detection and other terrestrial experiments.
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Acknowledgements
Many thanks to the organizers for putting together this stimulating workshop, and to the Simons Foundation for making it possible. Thanks also to my collaborators on the work highlighted here: J. Evans, B. Fields, C. Gaidau, S. Gori, and S. Shapiro. This work is supported in part by DOE Early Career award DE-SC0017840.
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Shelton, J. (2019). Some Minimal Cosmologies for Dark Sectors. In: Essig, R., Feng, J., Zurek, K. (eds) Illuminating Dark Matter. Astrophysics and Space Science Proceedings, vol 56. Springer, Cham. https://doi.org/10.1007/978-3-030-31593-1_17
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