  The data on production of cumulative particles in the high transverse momenta
domain (up to ~ 3.5 GeV/c) in proton-nucleus interactions are presented for the
first time. An indication on the local character of particle production in the
cumulative domain is obtained. The observed strong dependence of the particle
production cross section on the atomic mass of the target does not fit the A -
dependence obtained in the pre-cumulative and cumulative domains for low
transverse momenta at constant part of the exponent. The experiment was
performed at U70 (IHEP) with the extracted 50 GeV/c proton beam.

Nuclear Experiment;High Energy Physics - Experiment