Search for high energy 5.5 MeV solar axions with the complete Borexino dataset
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866909862876676096 |
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| author | Borexino Collaboration |
| author_facet | Borexino Collaboration |
| contents | A search for solar axions and axion-like particles produced in the $p+d\rightarrow\rm{^3He}+A~(5.5\rm{ ~MeV})$ reaction was performed using the complete dataset of the Borexino detector (3995 days of measurement live-time). The following interaction processes have been considered: axion decay into two photons $({\rm A}\rightarrow2γ)$, inverse Primakoff conversion on nuclei $({\rm A}+Z\rightarrowγ+Z$), the Compton conversion of axions to photons $({\rm A}+e\rightarrow e+γ)$ and the axio-electric effect $({\rm A}+e+Z\rightarrow e+Z$). Model-independent limits on axion-photon ($g_{Aγ}$), axion-electron ($g_{Ae}$), and isovector axion-nucleon ($g_{3AN}$) couplings are obtained: $|g_{Aγ}\times g_{3AN}| \leq 2.3\times 10^{-11} \rm{GeV}^{-1}$ and $|g_{Ae}\times g_{3AN}| \leq 1.9\times 10^{-13}$ at $m_A <$ 1 MeV (90\% c.l.). The Borexino results exclude new large regions of $g_{Aγ}$, and $g_{Ae}$ coupling constants and axion masses $m_A$, and leads to constraints on the products $|g_{Aγ}\times m_A|$ and $|g_{Ae}\times m_A|$ for the KSVZ- and the DFSZ-axion models. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2504_19135 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Search for high energy 5.5 MeV solar axions with the complete Borexino dataset Borexino Collaboration High Energy Physics - Experiment Solar and Stellar Astrophysics High Energy Physics - Phenomenology Nuclear Experiment A search for solar axions and axion-like particles produced in the $p+d\rightarrow\rm{^3He}+A~(5.5\rm{ ~MeV})$ reaction was performed using the complete dataset of the Borexino detector (3995 days of measurement live-time). The following interaction processes have been considered: axion decay into two photons $({\rm A}\rightarrow2γ)$, inverse Primakoff conversion on nuclei $({\rm A}+Z\rightarrowγ+Z$), the Compton conversion of axions to photons $({\rm A}+e\rightarrow e+γ)$ and the axio-electric effect $({\rm A}+e+Z\rightarrow e+Z$). Model-independent limits on axion-photon ($g_{Aγ}$), axion-electron ($g_{Ae}$), and isovector axion-nucleon ($g_{3AN}$) couplings are obtained: $|g_{Aγ}\times g_{3AN}| \leq 2.3\times 10^{-11} \rm{GeV}^{-1}$ and $|g_{Ae}\times g_{3AN}| \leq 1.9\times 10^{-13}$ at $m_A <$ 1 MeV (90\% c.l.). The Borexino results exclude new large regions of $g_{Aγ}$, and $g_{Ae}$ coupling constants and axion masses $m_A$, and leads to constraints on the products $|g_{Aγ}\times m_A|$ and $|g_{Ae}\times m_A|$ for the KSVZ- and the DFSZ-axion models. |
| title | Search for high energy 5.5 MeV solar axions with the complete Borexino dataset |
| topic | High Energy Physics - Experiment Solar and Stellar Astrophysics High Energy Physics - Phenomenology Nuclear Experiment |
| url | https://arxiv.org/abs/2504.19135 |