We test a novel idea of using a π− beam in the fixed-target experiments
to search for New Physics in the events with missing energy. Bounds for
invisible vector ρ meson decay were derived, analyzed, and compared with
the current limits on searching Dark Matter in the accelerator based
experiments. We demonstrate that the new approach can be effective tool to
probe sub-GeV Dark Matter parameter space.Comment: 8 pages,, 5 figures and 1 Tabl