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arXiv · 2104.05727

Axion-like Particles from Hypernovae

Andrea Caputo·Pierluca Carenza·Giuseppe Lucente·Edoardo Vitagliano·Maurizio Giannotti·Kei Kotake·Takami Kuroda·Alessandro Mirizzi
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Abstract

It was recently pointed out that very energetic subclasses of supernovae (SNe), like hypernovae and superluminous SNe, might host ultra-strong magnetic fields in their core. Such fields may catalyze the production of feebly interacting particles, changing the predicted emission rates. Here we consider the case of axion-like particles (ALPs) and show that the predicted large scale magnetic fields in the core contribute significantly to the ALP production, via a coherent conversion of thermal photons. Using recent state-of-the-art SN simulations including magnetohydrodynamics, we find that if ALPs have masses $m_a \sim {\mathcal O}(10)\, \rm MeV$, their emissivity via magnetic conversions is over two orders of magnitude larger than previously estimated. Moreover, the radiative decay of these massive ALPs would lead to a peculiar delay in the arrival times of the daughter photons. Therefore, high-statistics gamma-ray satellites can potentially discover MeV ALPs in an unprobed region of the parameter space and shed light on the magnetohydrodinamical nature of the SN explosion.

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Andrea Caputo, Pierluca Carenza, Giuseppe Lucente, Edoardo Vitagliano, Maurizio Giannotti, Kei Kotake, Takami Kuroda, Alessandro Mirizzi. 2021-04-12. Axion-like Particles from Hypernovae. https://doi.org/10.1103/physrevlett.127.181102

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