Probing axion-like particles with multimessenger observations of neutron star mergers
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866913921821048832 |
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| author | Lecce, Francesca Lella, Alessandro Lucente, Giuseppe Vijayan, Vimal Bauswein, Andreas Giannotti, Maurizio Mirizzi, Alessandro |
| author_facet | Lecce, Francesca Lella, Alessandro Lucente, Giuseppe Vijayan, Vimal Bauswein, Andreas Giannotti, Maurizio Mirizzi, Alessandro |
| contents | Axion-like particles (ALPs) can be copiously produced in binary neutron star (BNS) mergers through nucleon-nucleon bremsstrahlung if the ALP-nucleon couplings $g_{a N}$ are sizable. The ALP-photon coupling $g_{aγ}$ may trigger conversions of ultralight ALPs into photons in the magnetic fields of the merger remnant and of the Milky Way. This effect would lead to a potentially observable short gamma-ray signal, in coincidence with the gravitational-wave signal produced during the merging process. This event could be detected through multi-messenger observation of BNS mergers employing the synergy between gravitational-wave detectors and gamma-ray telescopes. Here, we study the sensitivity of current and proposed MeV gamma-ray experiments to detect such a signal. As an explicit example, we consider ALP couplings related as in the Kim-Shifman-Vainshtein-Zakharov (KSVZ) axion model, and show that in this case the proposed instruments can reach a sensitivity down to $g_{aγ}\gtrsim \textrm{few} \times 10^{-13}\,\text{GeV}^{-1}$ for $m_a \lesssim 10^{-9}$ eV, comparable with the SN 1987A limit. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_02032 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing axion-like particles with multimessenger observations of neutron star mergers Lecce, Francesca Lella, Alessandro Lucente, Giuseppe Vijayan, Vimal Bauswein, Andreas Giannotti, Maurizio Mirizzi, Alessandro High Energy Physics - Phenomenology High Energy Astrophysical Phenomena High Energy Physics - Theory Axion-like particles (ALPs) can be copiously produced in binary neutron star (BNS) mergers through nucleon-nucleon bremsstrahlung if the ALP-nucleon couplings $g_{a N}$ are sizable. The ALP-photon coupling $g_{aγ}$ may trigger conversions of ultralight ALPs into photons in the magnetic fields of the merger remnant and of the Milky Way. This effect would lead to a potentially observable short gamma-ray signal, in coincidence with the gravitational-wave signal produced during the merging process. This event could be detected through multi-messenger observation of BNS mergers employing the synergy between gravitational-wave detectors and gamma-ray telescopes. Here, we study the sensitivity of current and proposed MeV gamma-ray experiments to detect such a signal. As an explicit example, we consider ALP couplings related as in the Kim-Shifman-Vainshtein-Zakharov (KSVZ) axion model, and show that in this case the proposed instruments can reach a sensitivity down to $g_{aγ}\gtrsim \textrm{few} \times 10^{-13}\,\text{GeV}^{-1}$ for $m_a \lesssim 10^{-9}$ eV, comparable with the SN 1987A limit. |
| title | Probing axion-like particles with multimessenger observations of neutron star mergers |
| topic | High Energy Physics - Phenomenology High Energy Astrophysical Phenomena High Energy Physics - Theory |
| url | https://arxiv.org/abs/2504.02032 |