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Title:
Finding Exotic Particles in Fireballs
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Abstract:
Compact transients such as supernova and binary neutron star mergers can produce enormous fluxes of exotic particles. One way to look for them is through fireballs, a dense expanding photon electron plasma formed when exotic particles escaping a compact source quickly decay to the standard model. Fireballs produce a unique signal, allowing us to observe new parts of dark photon and axion parameter space. Fireballs from the neutron star merger GW170817can produce new constraints on axions with masses between 1 MeV and 1 GeV, while a fireball from SN1987a opens up previously ruled out parameter space.
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