Speaker
Tao Li
(Shanghai Jiao Tong University)
Description
Axion-like particles (ALPs) and dark photons (DPs) are viable dark matter particle candidates.We have searched for possible ALP/DP signals in the PandaX-4T liquid xenon detector using 440 kg$\cdot$yr of data. A binned likelihood fit is constructed to search for possible mono-energetic peaks induced by the absorption processes between ALPs/DPs and atomic electrons of xenon. A detailed temporal model of decays associated with xenon isotopes is introduced to constrain the number of background events. We have established the most stringent exclusion limits for most ALP/DP masses across the range of 150 keV/$c^2$ to 1 MeV/$c^2$, which is particularly significant within the mass range of 150–400 keV/$c^2$.
| Collaboration you are representing | PandaX |
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Author
Tao Li
(Shanghai Jiao Tong University)
