Quoted from long post at top:

"Proposed particle: The Elemental Energy Wave/Particle will have to be the tiniest particle and smallest unit of energy with infinitesimal mass. I can imagine it pulsing between a particle state and a wave state in such a way that at one instant this tiniest patch of energy can be expressed as a particle and at the next instant that particle transforms into wave movement of that particle in a pulsing sequence."

For kicks, I'll conjecture that all particles are theoretical.
There is no such thing as the tiniest particle and smallest unit. When you think you've really found it someone will find (or invent) one smaller.