Electroweak Symmetric Dark Matter Balls

Understand

In the simple Higgs-portal dark matter model with a conserved dark matter number, we show that there exists a non-topological soliton state of dark matter.

• This state has smaller energy per dark matter number than a free particle state and has its interior in the electroweak symmetric vacuum.
• It could be produced in the early universe from first-order electroweak phase transition and contribute most of dark matter.
• This electroweak symmetric dark matter ball is a novel macroscopic dark matter candidate with an energy density of the electroweak scale and a mass of 1 gram or above.