A heavy photon is a hypothetical particle that would be massive yet still able to interact with photons. It is not yet known if such particles exist, but if they do, they could help explain some puzzles in physics.
One puzzle that heavy photons could help solve is the so-called “dark matter” problem. Dark matter is an invisible form of matter that makes up most of the mass in the universe. Scientists have been trying to figure out what dark matter is made of for many years, but so far they have not been able to find any particles that fit all the observations. Heavy photons could be one possible candidate for dark matter.
Another puzzle that heavy photons could help explain is why there is more matter than antimatter in the universe. Matter and antimatter are two kinds of particles that are mirror images of each other. They cancel each other out when they come into contact, but for some reason there is more matter than antimatter in the universe. This imbalance is called the “matter-antimatter asymmetry.” If heavy photons exist, they could play a role in creating this asymmetry.
Heavy photons are just one possibility for new physics beyond what we already know. We may never know for sure if they exist or not, but scientists will continue searching for them and other new particles that could help us better understand our Universe.