Accidentally Asymmetric Dark Matter

Understand

We study the effect of a first-order phase transition in a confining $SU(N)$ dark sector with heavy dark quarks.

• The baryons of this sector are the dark matter candidate.
• During the confinement phase transition the heavy quarks are trapped inside isolated, contracting pockets of the deconfined phase, giving rise to a second stage of annihilation that dramatically suppresses the dark quark abundance.
• The surviving abundance is determined by the local accidental asymmetry in each pocket.