Dear Group,
I know it sounds like a foolish question but I have a reason for asking and I'm hoping someone here, more grounded in theoretical physics than I can find time to respond.
Here is why I pose the question...it seems to me that all this discussion of photons, and other sub-atomic particles possessing mass or negative mass is really a discussion about the mass of shadows.
Let me explain...according to my understanding of current theory, we live in a multiverse..and the multiverse is comprised of 11 dimensions.
We know that the basis of everything in the universe is 'light', whetehr visible or invisible..yes?
And as I have said in recent posts..[as is born out in super-string theory and zero-point-field theory] that would mean we are constantly being interacted with by other dimensions.
Isn't it conceivable that what we identify as sub-atomic particles possessing no mass but still exerting influence on our reality are nothing more than the 'shadows' from another dimension.
We can see shadows, we can measure their area, observe their outlines..but we cannot 'weigh' a shadow, as shadows are illusions of light that have no mass.
What we are observing then, when we observe these particles , is really the interaction of 'light' as it crosses or infiltrates between dimensions.
In these other dimensions what we perceive as a photon with no mass may actually be quite heavy..so heavy that in that dimension it could be that dimension's equivalent of a black hole a nano[star]gate which pushes its own equivalent of a plasma stream so powerful that it shoots particles into our space and time..our dimension...which we may perceive as sub-atomic, quantum particles...or mega

plasma coils
And of course, just like shadows, although we can see them, measure their movement and their area we will never be able to calculate their 'mass',..since they have none. So are shadows illusions or are they indicative of realities beyond our borders...
I thank you in advance for your responses
-Sincerely