Search for charmed particles produced in neutron interactions with carbon nuclei at 50 GeV mean energy

First results are given of an experiment aimed at finding charm particles formed as a result of neutron interactions with carbon nuclei at a mean energy of 50 GeV. The experiment was conducted on the Serpukhov proton synchrotron in cooperation with laboratories in Berlin, Budapest, Dubna, Prague, Sofia, and Tbilisi. In mass systems Msub(Λ0π+π-) and/or Msub(Λ0K+K-), two independent maxima were observed at approximately 2082 MeV/c2 and approximately 2780 MeV/c2, respectively, which have not so far been published. The maximum width is less than 20 MeV/c2, the height is around 15 events on the background of 3 events. For correct interpretation, the statistical significance of the maxima will have to be increased. (Z.J.)