Speaker
Matthew Baldwin
Description
Axions produced from dark matter decays can convert to photons in the magnetic fields of cosmological filaments, resulting in an isotropic gamma ray background flux. We present new indirect detection constraints on the axion mass and axion-photon coupling, for GeV- to TeV-scale dark matter with a decay lifetime below $10^{30}$ sec, by constraining this flux. We exclude significant parameter space for axion masses below $10^{-5}$ eV, including a portion of the QCD axion band, for $1$ TeV dark matter with a decay lifetime of $10^{19}$ sec, and $250$ nG filaments.
Authors
Duncan Rocha
(University of Chicago)
Gordan Krnjaic
(Fermilab)
Matthew Baldwin