Dark Photon Physics with a real extension of the SM Standard Model, lead to new Black Hole physics and cosmology like the Cyclic Multiverse. (Q-FFF Theory).
The Dark Photon, or AXION. is the opposite particle counterpart of all other photons creating attraction- and repulsion forces even for gravitons.
Arxiv, by: Marco Fabbrichesi, Emidio Gabrielli, Gaia Lanfranchi
The dark photon is a new gauge boson whose existence has been conjectured. It is dark because it arises from a symmetry of a hypothetical dark sector comprising particles completely neutral under the Standard Model interactions. Dark though it is, this new gauge boson can be detected because of its kinetic mixing with the ordinary, visible photon.
see: https://arxiv.org/abs/2005.01515
In Q-FFF Theory, The Dark Photon, or AXION. is the opposing force particle or counterpart of all other photons, creating attraction- or repulsion forces even for graviton attraction.
So for each force in nature this model needs two opposing particle interactions on Fermions, more ore less at the same moment.
Only the magnetic and electric photon particle seem to be able to repel charged or magnetic Fermions, by its larger punch to opposite Axions.
The graviton has always fewer punch to fermions than the opposite oscillating local Axion.
The dark photon is a new gauge boson whose existence has been conjectured.
It is dark because it arises from a symmetry of a hypothetical dark sector comprising particles completely neutral under the Standard Model interactions.
Dark though it is, this new gauge boson can be detected because of its kinetic mixing with the ordinary, visible photon.