New simulations expand search parameters for 'dark photons' as dark matter candidate

For decades, the invisible majority of the universe's matter has resisted every instrument we have aimed at it, leaving physicists to trace its presence only through the gravitational shadows it casts. Now, new computational simulations suggest that hypothetical particles called dark photons — long considered too constrained to be serious candidates — may interact with ordinary matter far more robustly than previously believed, and that conditions in the early universe may have naturally prevented the very problems that once ruled them out. The search for what the cosmos is made of has not end