Multi-Sommerfeld enhancement in dark sector

Understand

We study the multi-Sommerfeld enhancement in the case where $V(r)$ is composed of different kinds of potentials.

• We show that there are special properties of the multi-Sommerfeld enhancement.
• The physical content of the multi-Sommerfeld mechanism is carefully demonstrated.
• The multi-Sommerfeld enhancement might play a role in dark matter annihilation.