Registration and analysis of neutrino interactions in emulsion

A procedure is described for recording neutrino interactions in emulsion using the IHEP neutrino beam. Eight emulsion stacks with a total volume of 16 liters were irradiated. A neutrino detector was used to target the neutrino interaction vertices in the emulsion and to identify the secondary particles. The results of the first stage of investigations aimed at finding new short-lived particles are reported. Eight multiprong events were obtained from the results of target indication in the emulsion and were analyzed.