Dark photon search status in $\ddot{I}„-c$ energy region

Abstract

The dark photon plays an important role as a portal to dark matter and has been extensively studied on both experimental and theoretical frontiers. However, as no signals have been observed, the whereabouts of the dark photon remain a long-standing open question. With the proposal of a future $\ddot{I}„-c$ facility, this proceeding reviews and summarizes the current experimental status of the dark photon in the $\ddot{I}„-c$ energy region, which is expected to provide a reference for future searches. The experimental status indicates that the dark photon in the $\ddot{I}„-c$ energy region remains highly promising, highlighting the requirement for larger data samples or new methods to further investigate the benchmarks related to the observed cosmic dark matter.

Contribution to The 7th International Workshop on Future Tau-Charm Facilities (FTCF2025)