Particle mixing as possible explanation of the dark energy conundrum

TL;DR

This paper proposes that vacuum condensates from neutrino and quark mixing act as a cosmological constant, potentially explaining dark energy within current Lorentz invariance constraints.

Contribution

It introduces a novel explanation for dark energy based on particle mixing-induced vacuum condensates behaving as a perfect fluid.

Findings

Vacuum condensates mimic a cosmological constant

Lorentz invariance breaking constrains dark energy value

Particle mixing effects could account for dark energy

Abstract

The vacuum condensate due to neutrino and quark mixing behaves as a perfect fluid and, at the present epoch, as a cosmological constant. The very small breaking of the Lorentz invariance constrains today the value of the dark energy.