Study Reopens 10 Orders of Dark Photon Mass Range for Dark Matter Searches
Updated
Updated · Newswise · Aug 14
Study Reopens 10 Orders of Dark Photon Mass Range for Dark Matter Searches
3 articles · Updated · Newswise · Aug 14
Summary
A Physical Review Letters paper finds dark photons would not have significantly heated the early universe, reviving a broad swath of parameter space once ruled out by cosmological limits.
New simulations showed the dark-photon-to-light conversion becomes violently nonlinear and shuts itself off after only a tiny energy transfer, overturning the linear treatment used for about 15 years.
The revised analysis invalidates conventional constraints across roughly 10 orders of magnitude in mass—from about 10^-15 eV to 10^-6 eV—covering frequencies from kilohertz to gigahertz radio bands.
Researchers said the result could redirect experiments toward newly reopened search regions and may force similar rechecks of astrophysical limits on other particles in plasmas such as neutron-star and white-dwarf magnetospheres.