I know that per current knowledge there are layers of size of physical entities going from elementary particles to molecules (and from molecules to molecular structures such as bricks or organism cells and further into a tools, buildings, machines and organism bodies).
I understand that the notion between human scientists is that the "size" or "scale" of elementary particles (whatever these will be) is finite;
that is: Elementary particles are the smallest physical entities in this universe and there can't be anything smaller than them in this universe.
Is there a theory according to which infinity for how small physical entities can be, is real?
I am not talking about a theory theorizing even more and smaller elementary particles than accepted, but rather a theory that its theoreticians are "irreverent" to suggest that there is no such thing as "elementary" particle by the sense that one could always go down in the "scale" of size.
One could be further irreverent to derive from such theory that because time passes faster in micro than in macro, entire universes could exist and might appear to an observing organism as a "particle" with a lifespan of way less than a millisecond.
Also, of course the opposite question (Can there be maximal size of physical entities?) is dependent on if the cosmos is finite or infinite, but the current question doesn't seem to me such.