First Constraint on Axion-Photon Coupling $g_γ$ from Neutron Star Observations
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866913885172269056 |
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| author | Wang, Jun-Chen Cao, Shunshun Jiang, Jinchen Liu, Yandong Cao, Qing-Hong Shao, Lijing |
| author_facet | Wang, Jun-Chen Cao, Shunshun Jiang, Jinchen Liu, Yandong Cao, Qing-Hong Shao, Lijing |
| contents | We propose a novel method to detect axions which uniquely depends on the dimensionless axion-photon coupling $g_γ$, independent of the suppressive axion decay constant $f_a$. Using neutron star PSR B1919+21 data from the Five-hundred-meter Aperture Spherical Telescope, we derive the first constraint $|g_γ|<0.93$ at $1σ$ confidence level for ultra-light axions ($m_a < 10^{-11}$ eV). |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2506_07546 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | First Constraint on Axion-Photon Coupling $g_γ$ from Neutron Star Observations Wang, Jun-Chen Cao, Shunshun Jiang, Jinchen Liu, Yandong Cao, Qing-Hong Shao, Lijing High Energy Physics - Phenomenology High Energy Astrophysical Phenomena We propose a novel method to detect axions which uniquely depends on the dimensionless axion-photon coupling $g_γ$, independent of the suppressive axion decay constant $f_a$. Using neutron star PSR B1919+21 data from the Five-hundred-meter Aperture Spherical Telescope, we derive the first constraint $|g_γ|<0.93$ at $1σ$ confidence level for ultra-light axions ($m_a < 10^{-11}$ eV). |
| title | First Constraint on Axion-Photon Coupling $g_γ$ from Neutron Star Observations |
| topic | High Energy Physics - Phenomenology High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2506.07546 |