Setting solar axion g_aγγlimits using XENONnT and TEXONO data

Theoretical explanations for axion-like particles (ALPs) properties are vast, however experimental searches remain difficult. In theory, properties of solar-ALPs can be well studied under the inelastic inverse Primakoff process. The ALP-photon coupling constant, g_aγγ, is of particular interest due to experimental searches being competitively scarce.

In this study, the g_aγγ-m_a parameter space is probed for solar-ALPs and new constraints are placed on g_aγγ from two direct dark matter search experiments, the underground XENONnT and surface germanium detector TEXONO. Solar-ALP flux and inelastic inverse Primakoff process cross section are considered for different form factors and the complementing DM-search signal datasets are examined and compared to theoretical formulations to set new limits in this space.