Abstract
We report new searches for solar axions and galactic axionlike dark matter particles, using the first low-background data from the PandaX-II experiment at China Jinping Underground Laboratory, corresponding to a total exposure of about . No solar axion or galactic axionlike dark matter particle candidate has been identified. The upper limit on the axion-electron coupling () from the solar flux is found to be about in the mass range from to with 90% confidence level, similar to the recent LUX result. We also report a new best limit from the deexcitation. On the other hand, the upper limit from the galactic axions is on the order of in the mass range from 1 to with 90% confidence level, slightly improved compared with the LUX.
- Received 25 July 2017
DOI:https://doi.org/10.1103/PhysRevLett.119.181806
© 2017 American Physical Society