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Journal Articles Physical Review D Year : 2024

Uncovering axion-like particles in supernova gamma-ray spectra

Abstract

A future Galactic Supernova (SN) explosion can lead to a gamma-ray signal induced by ultralight Axion-Like Particles (ALPs) thermally produced in the SN core and converted into high-energy photons in the Galactic magnetic field. The detection of such a signal is in the reach of the Large Area Telescope aboard the \emph{Fermi} Gamma-Ray Space Telescope. The observation of gamma-ray emission from a future SN has a sensitivity to $g_{a\gamma}\gtrsim 4\times 10^{-13}$ GeV$^{-1}$ for a SN at fiducial distance of $10$ kpc and would allow us to reconstruct the ALP-photon coupling within a factor of $\sim2$, mainly due to the uncertainties on the modeling of the Galactic magnetic field.

Dates and versions

hal-04135695 , version 1 (21-06-2023)

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Francesca Calore, Pierluca Carenza, Christopher Eckner, Maurizio Giannotti, Giuseppe Lucente, et al.. Uncovering axion-like particles in supernova gamma-ray spectra. Physical Review D, 2024, 109 (4), pp.043010. ⟨10.1103/PhysRevD.109.043010⟩. ⟨hal-04135695⟩
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