Discovery of η-MESIC Nuclei.

The first experimental results confirmed the existence of eta-mesic nuclei are represented. The experiment was performed at 1 GeV electron synchrotron of LPI. The correlated (π⁺n) pairs from ¹²C-target were detected by two TOF scintillation spectrometers placed oppozite both transversly to γ-beam. It was used two value of top energies of bremsstrahlung beam: 650 and 850 MeV (below and above of the photoproduction threshold of η-meson on nucleon.) The received results are allowed to speak about of the creation of eta-mesic nuclei at intermediate state of the studied reaction.