Photo-production of axions in Supernovae
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866911859252133888 |
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| author | Chakraborty, Sabyasachi Gupta, Aritra Vanvlasselaer, Miguel |
| author_facet | Chakraborty, Sabyasachi Gupta, Aritra Vanvlasselaer, Miguel |
| contents | Compact stellar objects like supernovae and neutron stars are believed to cool by emitting axions predominantly via axion bremsstrahlung ($NN \to NNa$), pion conversion ($π^- p^+ \to N a$) and photo-production ($γN \to N a$). In this paper, we study in detail the photo-production channel, from the unavoidable anomaly induced Wess-Zumino-Witten term $\propto ε^{μναβ}\, F_{μν}\, \partial_αa \, ω_β$ in conjunction with the low energy pion photo-production data. We found that for heavier axions, i.e., $m_a\sim\mathcal{O}(100)$ MeV, photo-production processes can be dominant compared to the usual axion emission processes. In addition, the spectrum of axions emitted in the process is significantly harder than those originating from bremsstrahlung. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_12169 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Photo-production of axions in Supernovae Chakraborty, Sabyasachi Gupta, Aritra Vanvlasselaer, Miguel High Energy Physics - Phenomenology High Energy Astrophysical Phenomena Compact stellar objects like supernovae and neutron stars are believed to cool by emitting axions predominantly via axion bremsstrahlung ($NN \to NNa$), pion conversion ($π^- p^+ \to N a$) and photo-production ($γN \to N a$). In this paper, we study in detail the photo-production channel, from the unavoidable anomaly induced Wess-Zumino-Witten term $\propto ε^{μναβ}\, F_{μν}\, \partial_αa \, ω_β$ in conjunction with the low energy pion photo-production data. We found that for heavier axions, i.e., $m_a\sim\mathcal{O}(100)$ MeV, photo-production processes can be dominant compared to the usual axion emission processes. In addition, the spectrum of axions emitted in the process is significantly harder than those originating from bremsstrahlung. |
| title | Photo-production of axions in Supernovae |
| topic | High Energy Physics - Phenomenology High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2403.12169 |