MCTP HET BROWN BAG SEMINAR
The SIMP Miracle


Apr
02
2014

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  • Speaker: Yonit Hochberg (UC Berkeley, Physics)
  • Host Department: Physics
  • Date: 04/02/2014
  • Time: 12:00 PM - 1:00 PM

  • Location: Oskar Klein Room 3481 Randall

  • Description:

    We present a new paradigm for achieving thermal relic dark matter. The mechanism arises when a nearly secluded dark sector is thermalized with the Standard Model after reheating. The freeze out process is a number-changing 3\to 2 annihilation of strongly-interacting-massive-particles (SIMPs) in the dark sector and points to sub-GeV dark matter. The couplings to the visible sector, necessary for maintaining thermal equilibrium with the Standard Model, imply measurable signals that will allow coverage of a significant part of the parameter space with future indirect and direct detection experiments and via direct production of dark matter at colliders. Moreover, 3\to 2 annihilations typically predict sizable 2\to 2 self-interactions which naturally address the `core vs. cusp' and `too-big-to-fail' small structure problems.