How scalar-field dark matter may conspire to facilitate baryogenesis at the electroweak scale

Understand

The cosmic evolution of a dark matter model which behaves relativistically in the early Universe is explored.

• Dark matter is described as a complex scalar field, whose earliest evolution is characterized by a stiff equation of state ($p \simeq \rho$).
• In this phase, it is the dominant component in the Universe.
• We present constraints from Big Bang nucleosynthesis and primordial gravity waves from inflation.