DARK ENERGY VS BARYONIC MATTER. “We conclude (at least are led to speculate) that the “particles” constituting dark energy obey infinite statistics, rather than the familiar Fermi or Bose statistics. This is the over-riding difference between dark energy and conventional matter. Note that here it is the physical non-negativity requirement of entropy for a gravitational system that leads to this unexpected conclusion.”
https://www.mdpi.com/1099-4300/21/11/1035/htm