I can't think of a single particle whose existence has been postulated as a result of gravitational theories. Perhaps the graviton is one, but that s about it. At least a proton and an electron and in most cases a neutron. These are peculiar and nonstandard definitions. Even a single quark is considered to be a particle of matter.
All elementary particles are either matter particles or force-carrying particles.
An electron is a mater particle, and so is a quark. It may seem like a small point, but I think that errors like these are what make Lazar s theory so dubious. This is the place where Lazar begins to get him self in real trouble. The equations and coupling strengths which describe the two forces are totally different and unrelated. The strong force couples only to quarks and gluons.