摘要
We communicate many difficulties that we encounter when attempting to pinpoint a common origin for the several observed anomalies[1;2] or assessing their tension with existing exclusion limits. These include systematics affecting the operation of the detectors, our knowledge of their response, astrophysical uncertainties, and the broad range of particle couplings that can mediate the interaction with a detector target. The interesting astrophysical evidence[2] that motivates a search for dark-photon and focuses our attention on a Hidden Valleys model with a GeV-scale dark sector that produces exciting signatures. Results from the recent underground experiments[1] are also considered.
