Heavy photophilic axion-like particles produced in the first milliseconds of a GRB fireball can remove enough energy to quench the burst, yielding new lower bounds on the axion-photon coupling down to about 4e-12 GeV^-1 for masses 200 MeV to 5 GeV.
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Heavy Axions Can Disrupt $\gamma$-ray Bursts
Heavy photophilic axion-like particles produced in the first milliseconds of a GRB fireball can remove enough energy to quench the burst, yielding new lower bounds on the axion-photon coupling down to about 4e-12 GeV^-1 for masses 200 MeV to 5 GeV.