Abstract
Axion-like particles (ALPs) are a class of hypothetical pseudo-scalar particles and can be created in hot astrophysical plasma through the interaction between photons. I calculate the production of ALPs in type Ia supernovae. It is found that many ALPs lighter than a few MeV can be produced in type Ia supernovae. Once produced, heavy ALPs decay into photons during propagation in the interstellar space. I calculate the flux of the decay photons and find that it may be detected by future MeV γ-ray telescopes if a type Ia supernova explodes near the Solar System.
Highlights
Axion-like particles (ALPs) are hypothetical pseudo Nambu-Goldstone bosons which can couple with photons
The ALP-photon coupling is fixed to g10 = 1
The delay time is calculated as t = L1/β + L2 − dSN, where L1 ∼ λ is the distance which ALPs travel, L2 is the distance which decay photons travel, and dSN is the distance between the SN Ia and the Solar System
Summary
Axion-like particles (ALPs) are hypothetical pseudo Nambu-Goldstone bosons which can couple with photons. ALP parameters can be constrained by comparing the model calculation and neutrino observations of SN 1987A. Once produced in an astronomical object, heavy ALPs decay into photons during propagation in the interstellar space.
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