Search for axioelectric effect of solar axions using BGO scintillating bolometer

TL;DR

This study searches for solar axions via the axioelectric effect using a BGO scintillating bolometer, setting new limits on axion-nucleon and axion-electron couplings for hadronic axions in the 0.1-1 MeV mass range.

Contribution

It provides the first model-independent limits on axion couplings from solar axion detection with a BGO detector, especially constraining hadronic axion parameters.

Findings

Set a limit on axion-nucleon and axion-electron coupling: |g_Ae × g_AN^3| < 1.9×10^{-10}

Constrained axion-electron coupling for hadronic axions in 0.1-1 MeV mass range: |g_Ae| ≤ (0.96-8.2)×10^{-8}

Performed the first search of solar axions with a BGO scintillating bolometer

Abstract

A search for axioelectric absorption of solar axions produced in the $ p + d \rightarrow {^3\rm{He}}+\gamma~(5.5~ \rm{MeV})$ reactions has been performed with a BGO detector placed in a low-background setup. A model-independent limit on an axion-nucleon and axion-electron coupling constant has been obtained: $| g_{Ae}\times g_{AN}^3|< 1.9\times 10^{-10}$ for 90% confidence level. The constrains of the axion-electron coupling have been obtained for hadronic axion with masses in (0.1 - 1) MeV range: $|g_{Ae}| \leq (0.96 - 8.2)\times 10^{-8}$.