Searching for solar axions at the Sudbury Neutrino Observatory（萨德伯里中微子观测站上寻找太阳轴子）

by Dr Nick Houston (北京工业大学)

Monday 27 Apr 2020, 17:00 → 18:00 Asia/Shanghai

ID：726 774 606 (腾讯会议)

腾讯会议（ID：726 774 606） 摘要：We explore a novel detection possibility for solar axions, which relies only on their couplings to nucleons, via the axion-induced dissociation of deuterons into their constituent neutrons and protons. An opportune target for this process is the now-concluded Sudbury Neutrino Observatory (SNO) experiment, which relied upon large quantities of heavy water to resolve the solar neutrino problem. From the full SNO dataset we exclude in a model-independent fashion isovector axion-nucleon couplings for sub-MeV axion masses, covering previously unexplored regions of the axion parameter space. In the absence of a precise cancellation between g_an and g_ap this result also exceeds comparable constraints from other laboratory experiments, and excludes regions of the parameter space for which astrophysical constraints from SN1987A and neutron star cooling are inapplicable due to axion trapping.