Search for solar hadronic axions produced by a bremsstrahlung-like process
arXiv:0807.3482 · doi:10.1016/j.physletb.2008.12.033
Abstract
We have searched for hadronic axions which may be produced in the Sun by a bremsstrahlung-like process, and observed in the HPGe detector by an axioelectric effect. A conservative upper limit on the hadronic axion mass m_a < 334 eV at 95% C.L. is obtained. Our experimental approach is based on the axion-electron coupling and it does not include the axion-nucleon coupling, which suffers from the large uncertainties related to the estimation of the flavor-singlet axial-vector matrix element.
9 pages, 3 figures; version to appear in PLB