I don't think so. We know the inertial mass of particles (charged particles). From those inertial masses, we calculate the mass of a hydrogen atom (in the case of electron and proton).
Since those measurements are consistent, we conclude that the Gravitational Mass of an electron is proportional to the Inertial Mass of an electron.
That is the Weak Equivalence Principle.
My theory tells me that the gravitational mass of an electron is equal to the gravitational mass of a proton and both are equal to the Gravitational mass of two hydrogen atoms.
If you do the calculation, you will realize that one only measures Gravitational Masses for neutral moieties.
The assignment of protons and electrons into a single moiety is called The Fundamental Dilator Paradigm, which I proposed in 2006 in the Hypergeometrical Universe Theory (HU).
HU proposed that matter is made directly and simply a coherence between stationary states of deformation of space (not spacetime). As a coherence, energy flows from state to state (electron state to proton state), tunneling while spinning. Since it is a deformation of space, it can be positive (dilation) or negative (contraction).
This means that the Fundamental Dilator is driven by three processes: tunneling, spinning, and the dilation-contraction alternation.
I explained Gravitation as a Van der Waals force where the relaxation time was 1E-24 seconds.
Faster relaxation means stronger screening and weaker force.
In my theory, I considered two kinds of Fundamental Dilators:
a) Electromagnetic Fundamental Dilator (with four phases representing the four fundamental particles).
b) Gravitational Fundamental Dilator (a hydrogen atom)
In other words, the gravitational mass of an electron can be the same as the gravitational mass of a proton and both can be equal to half the gravitational mass of a hydrogen atom
Because of that, I became interested in this result:
https://arxiv.org/pdf/1508.04377.pdf
My theory proposed that Matter is composed of Fundamental Dilator Polymers.
I introduced two archetypes: the GFD and the EFD. EFD is the Electronic Fundamental Dilator (e.g. Proton, electron, antiproton, positron).
The GFD archetype is a hydrogen atom.
I did this before it became clear to me that gravitation was a van der Waals force.
For both forces, the Quantum Lagrangian Principle (a replacement to all laws of Physics and specially to Newton's laws of dynamics) states that FDs will move into position where they dilate space in phase with the local dilaton field (metric waves generated by the shapeshifting done by FDs). They do so such as not to do work just by existing.
Independently upon being Gravitation or Electromagnetism, they will move sideways by x (shown in the figure). The force will be calculated in two parts. First, calculate the stress (change in the direction of velocity (alpha), and then multiply that by strain (the 3D volume of the probe particle. In other words, for both EM and Gravitation, HU calculates acceleration and them multiply that acceleration by the probe mass. This means that the Gravitational force will always be proportional to the inertial mass (FD footprint times density of energy per volume of a particle).
That said, the actual Gravitational Mass (ability to create a Gravitational Field will always be different. In other words, Gravitational mass is similar to the charge. The gravitational mass of a proton is equal to the gravitational mass of an electron.
The actual force is distinct because of how a force is calculated in HU. You never saw this argument because no other theory can derive the laws of nature from first principles.
My theory proposes that. That said, one can envision a scenario where that wouldn't be correct.
Well... I am happy that this article's conclusion is consistent with my theory and that I can forget about this part of the theory.