Dark matter shows that the gravity is too strong, and the Dark energy shows that the gravity is too weak.
When we talk about mass
Maybe the total energy is the very basic one. The coupling constant is related to the static mass of fermions, but it could also be due to potential between the fermion and Higgs, so it's also energy.
How do we measure the mass of an electron? What does this mass mean?
From wiki, it's uncertainty is from Planck constant.

Materials

\cite{Lorstad:1988ff} gives the Bose Einstein effects, and it's implemented in Pythia. But this considered lacking the theoretical bases.

The idea

  1. There is no CP violation