Detecting light axions from supernovae in nearby galaxies
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866911301328961536 |
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| author | Lecce, Francesca Lella, Alessandro Lucente, Giuseppe Giannotti, Maurizio Mirizzi, Alessandro |
| author_facet | Lecce, Francesca Lella, Alessandro Lucente, Giuseppe Giannotti, Maurizio Mirizzi, Alessandro |
| contents | Axion-like particles (ALPs) coupled to nucleons can be efficiently produced in core-collapse supernovae (SNe) and then, if they couple to photons, convert into gamma rays in cosmic magnetic fields, generating short gamma-ray bursts. Though ALPs from a Galactic SN would induce an intense and easily detectable gamma-ray signal, such events are exceedingly rare. In contrast, a few SNe per year are expected in nearby galaxies within $\mathcal{O}(10)$ Mpc, where strong magnetic fields can enable more efficient ALP-photon conversions than in the Milky Way, offering a promising extragalactic target. This circumstance motivates full-sky gamma-ray monitoring, ideally combined with deci-hertz gravitational-wave detectors to enable time-triggered searches from nearby galaxies. We show that, under realistic conditions, a decade of coverage could reach sensitivities to ALP-photon coupling $g_{a γ} \gtrsim 10^{-16} \rm{GeV}^{-1}$ for ALP masses $m_a \lesssim 10^{-9} $ eV and assuming an ALP-nucleon coupling close to SN 1987A cooling bound. This sensitivity would allow one to probe a large, currently-unexplored region of the parameter space below the longstanding SN 1987A bound. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2512_04185 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Detecting light axions from supernovae in nearby galaxies Lecce, Francesca Lella, Alessandro Lucente, Giuseppe Giannotti, Maurizio Mirizzi, Alessandro High Energy Physics - Phenomenology Axion-like particles (ALPs) coupled to nucleons can be efficiently produced in core-collapse supernovae (SNe) and then, if they couple to photons, convert into gamma rays in cosmic magnetic fields, generating short gamma-ray bursts. Though ALPs from a Galactic SN would induce an intense and easily detectable gamma-ray signal, such events are exceedingly rare. In contrast, a few SNe per year are expected in nearby galaxies within $\mathcal{O}(10)$ Mpc, where strong magnetic fields can enable more efficient ALP-photon conversions than in the Milky Way, offering a promising extragalactic target. This circumstance motivates full-sky gamma-ray monitoring, ideally combined with deci-hertz gravitational-wave detectors to enable time-triggered searches from nearby galaxies. We show that, under realistic conditions, a decade of coverage could reach sensitivities to ALP-photon coupling $g_{a γ} \gtrsim 10^{-16} \rm{GeV}^{-1}$ for ALP masses $m_a \lesssim 10^{-9} $ eV and assuming an ALP-nucleon coupling close to SN 1987A cooling bound. This sensitivity would allow one to probe a large, currently-unexplored region of the parameter space below the longstanding SN 1987A bound. |
| title | Detecting light axions from supernovae in nearby galaxies |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2512.04185 |