Search for high energy 5.5 MeV solar axions with the complete Borexino dataset

Le résumé fourni par la source

Abstract A search for solar axions and axion-like particles produced in the $$p+d\rightarrow ^3\textrm{He}+A~(5.5 ~\textrm{MeV})$$ p + d → 3 He + A ( 5.5 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 $$(\textrm{A}\rightarrow 2\gamma )$$ ( A → 2 γ ) , inverse Primakoff conversion on nuclei $$(\textrm{A}+Z\rightarrow \gamma +Z$$ ( A + Z → γ + Z ), the Compton conversion of axions to photons $$(\textrm{A}+e\rightarrow e+\gamma )$$ ( A + e → e + γ ) and the axio-electric effect $$(\textrm{A}+e+Z\rightarrow e+Z$$ ( A + e + Z → e + Z ). Model-independent limits on product of axion–photon ( $$g_{A\gamma }$$ g A γ ), axion–electron ( $$g_{Ae}$$ g Ae ), and isovector axion–nucleon ( $$g_{3AN}$$ g 3 A N ) couplings are obtained: $$|g_{A\gamma }\times g_{3AN}| \le 2.3\times 10^{-11} \textrm{GeV}^{-1}$$ | g A γ × g 3 A N | ≤ 2.3 × 10 - 11 GeV - 1 and $$|g_{Ae}\times g_{3AN}| \le 1.9\times 10^{-13}$$

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