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arXiv · 2306.16397

Constraining MeV-scale axion-like particles with Fermi-LAT observations of SN 2023ixf

Eike Ravensburg·Pierluca Carenza·Christopher Eckner·Ariel Goobar
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Abstract

The Fermi-LAT observations of SN 2023ixf, a Type II supernova in the nearby Pinwheel Galaxy, Messier 101 (M101), presents us with an excellent opportunity to constrain MeV-scale Axion-Like Particles (ALPs). By examining the photon decay signature from heavy ALPs that could be produced in the explosion, the existing constraints on the ALP-photon coupling can be improved, under optimistic assumptions, by up to a factor of $ \sim 2 $ for masses $ m_a \lesssim 3 $ MeV. Under very conservative assumptions, we find a bound that is slightly weaker than the existing ones for $ m_a \lesssim 0.5$ MeV. The exact reach of these searches depends mostly on properties of the SN progenitor. This study demonstrates the relevance of core-collapse supernovae, also beyond the Magellanic Clouds, as probes of fundamental physics.

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Eike Ravensburg, Pierluca Carenza, Christopher Eckner, Ariel Goobar. 2023-06-28. Constraining MeV-scale axion-like particles with Fermi-LAT observations of SN 2023ixf. https://doi.org/10.1103/physrevd.109.023018

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