PAAI in the sky : towards a particulate mechanism for Dark Energy and concordant Dark Matter

TL;DR

This paper proposes a hidden sector plasma mechanism involving light fermions and an abelian gauge force to explain Dark Energy, Dark Matter, and cosmic magnetic fields within a unified framework.

Contribution

It introduces the PAAI plasma model with asymmetric light fermions as a novel explanation for Dark Energy and Dark Matter, linking them through a hidden sector.

Findings

PAAI can simulate Dark Energy for specific parameters.

Additional fermions account for Dark Matter.

Residual magnetic fields can seed cosmic magnetic fields.

Abstract

We propose the origins of Dark Energy in a hidden sector with a pair of very light fermions, oppositely charged under an abelian gauge force $U(1)_X$ but of unequal mass. The system is dubbed PAAI, plasma which is abelian, asymmetric and idealised. For a range of the hidden fine structure constant values and the value of mass of the lightest fermion the PAAI is argued to simulate Dark Energy. Additional fermions from the same sector are shown to account for Dark Matter. Further, residual $X$-magnetic fields can mix with Maxwell electromagnetism to provides the seed for cosmic-scale magnetic fields. Thus the scenario can explain several cosmological puzzles from within the same hidden sector.