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Axionlike Particles from Hypernovae.

Andrea Caputo^1,2,3, Pierluca Carenza^4,5, Giuseppe Lucente^4,5

¹School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv 69978, Israel.

Physical Review Letters

|November 12, 2021

Summary

This summary is machine-generated.

Energetic supernovae may host ultrastrong magnetic fields, boosting axionlike particle (ALP) production. This discovery could enable MeV ALP detection and reveal supernova magnetohydrodynamics.

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Area of Science:

Astrophysics
Particle Physics
Cosmology

Background:

Energetic supernovae, like hypernovae, may possess ultrastrong core magnetic fields.
These magnetic fields could influence the production rates of feebly interacting particles.

Purpose of the Study:

Investigate axionlike particle (ALP) production in supernovae with strong magnetic fields.
Determine the impact of magnetic fields on ALP emissivity and potential detectability.

Main Methods:

Utilized state-of-the-art supernova simulations incorporating magnetohydrodynamics.
Analyzed the coherent conversion of thermal photons into ALPs within magnetic fields.

Main Results:

Found that MeV-mass ALPs exhibit significantly enhanced emissivity (over 2 orders of magnitude) in these extreme conditions.
Predicted that radiative decay of massive ALPs could cause delayed photon arrival times.

Conclusions:

Suggests MeV ALPs could be discovered by gamma-ray satellites by probing an uninvestigated parameter space.
Highlights the potential to illuminate the magnetohydrodynamical processes governing supernova explosions.