Dark Photon Superradiance

          @misc{ scivideos_PIRSA:25030088,
            doi = {10.48660/25030088},
            url = {https://pirsa.org/25030088},
            author = {Siemonsen, Nils Peter},
            keywords = {Strong Gravity},
            language = {en},
            title = {Dark Photon Superradiance},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2025},
            month = {mar},
            note = {PIRSA:25030088 see, \url{https://scivideos.org/index.php/pirsa/25030088}}
          }
          

Abstract

Gravitational and electromagnetic signatures of black hole superradiance are a unique probe of ultralight particles that are weakly-coupled to ordinary matter. Through the kinetic mixing with the Standard Model photon, a dark photon superradiance cloud sources a rotating visible electromagnetic field. I will describe how this leads to the production of a turbulent pair plasma, characterized by efficient magnetic reconnection, which radiates large-luminosity high-energy electromagnetic emissions. This enables multi-messenger search strategies to probe unconstrained regions of parameter space.