We report on the population of 47 compact binary mergers detected with a false-alarm rate of <$1\,{\mathrm{yr}}^{-1}$ in the second LIGO–Virgo Gravitational-Wave Transient Catalog. We observe several characteristics of the ...

Dark matter sectors with hidden interactions have been of much interest in recent years. These frameworks include models of millicharged particles as well as dark sector bound states, whose constituents have electromagnetic ...