Could there be a basic "Particle?"
Yes, it seems possible that there could be a basic unit structure of some sort. Here is one possibility.
The observation that there is a relationship which can be written, mass times radius equals Planck's constant divided by the speed of light, leads to the observation that there could be considered to exist a fundamental particle which would have identical values in grams and centimeters of the square root of Planck's constant divided by the speed of light, i.e., (h/c)^1/2 or approximately 4.7 x 10^19 g. or cm. This particle could be jokingly called the "sin-free" particle from a combination of the names of the two Helium.com writers whose speculations have led to its "discovery."
This particle would be what might be called a "toroid pseudo-sphere," a particle which would have essentially a spherical shape but with an axis through the middle and an "equator." It would have a constant rotational angular velocity of "c," and may be postulated to have an inversion frequency such that there would be one inversion per rotation. This inversion frequency would be c/(h/c)^1/2 -approximately 6.4 x 10^28 Hz.
the interesting thing about this particle is that it can be considered as the "parent" of an infinitude of particles which could be considered to invert through it. Included among these particles would be the "parent" particle which one may postulate to be formed when an electron and an anti-electron are said to "annihilate." The unit that would be formed from a proton to anti-proton union and even, very possibly, what could be considered as a "super -particle" which comprised our known universe!
The idea of a super-particle universe follows from the observation that mass and radius values are interchangeable to produce the constant of value, h/c. that is, a moderately huge mass associates with a relatively tiny radius and vice versa. if we postulated a mass of 10^10 grams that would be assodiated with a distance of approximately 2.21 x 10^-47 cm. and the converse would be 2.21 x 10-47 grams associated with 10^10 cm.
The inversion frequency of this example would be about 3 Hz. If we try a huge enough mass we can find inversion frequencies for such units that would correspond to inversion times of many billions of years. The entire universe could possibly simply be an inverting "particle" wherein we are riding in the expansion phase. Could it be shown that a "Big Bang" might occur as the contraction/expansion passed through the "parent particle?"