FEATURES OF LEADING LAMBDA-HYPERONS PRODUCED BY NEUTRONS ON NUCLEI

The kinematical features of leading Lambda hyperons produced an carbon and lead nuclei by 4-10-GeV neutrons and accompanied only by neutral particles are presented for angles with respect to the beam axis that lie in the region theta < 8.5 degrees. The experiment performed in a n eutron beam from the proton synchrotron installed at ITEP (Moscow) emp loyed the KAON magnetic spectrometer. The normalized invariant cross s ection as a function of p(perpendicular to)(2) can be fitted to the ex pression Dexp(-B p(perpendicular to)(2)), where the parameter B is fou nd to be independent or the type of nucleus [B = 8.71 +/- 0.09 (GeV/c) (-2) for carbon and B = 8.83 +/- 0.18 (GeV/c)(-2) for lead]. In contra st to what was previously observed for leading mesons, no dependence o f the x(F) distribution on the target mass number is seen in data for leading Lambda hyperons.