PIRSA:09060046

Slightly nonminimal Hidden sector,Slightly nonthermal relic abundance, and Indirect Detection

Nelson, A. (2009). Slightly nonminimal Hidden sector,Slightly nonthermal relic abundance, and Indirect Detection . Perimeter Institute. https://pirsa.org/09060046

Nelson, Ann. Slightly nonminimal Hidden sector,Slightly nonthermal relic abundance, and Indirect Detection . Perimeter Institute, Jun. 12, 2009, https://pirsa.org/09060046 

          @misc{ pirsa_PIRSA:09060046,
            doi = {10.48660/09060046},
            url = {https://pirsa.org/09060046},
            author = {Nelson, Ann},
            keywords = {Particle Physics, Cosmology},
            language = {en},
            title = {Slightly nonminimal Hidden sector,Slightly nonthermal relic abundance, and Indirect Detection },
            publisher = {Perimeter Institute},
            year = {2009},
            month = {jun},
            note = {PIRSA:09060046 see, \url{https://pirsa.org}}
          }

Ann Nelson

Talk number
PIRSA:09060046
Collection
Talk Type
Subject
Abstract
I consider a the dark matter relic abundance computation in a model where the dark matter annihilates into a light mediator rather than directly into the standard model. Obtaining the correct relic abundance in such a model may imply a different annihilation cross section than is implied by the usual WIMP decoupling computation. I show that the maximum annihilation cross section is obtained when the hidden sector decouples from the standard model before the dark matter annihilates into the mediator particles, and may be as much as a factor of 5 larger than the standard WIMP value.