Abstract
A study of particles emitted within a forward angle of 5° in collisions of 25 GeV/c protons with emulsion nuclei has been made with a stack exposed in a pulsed magnetic field of 200 kG-. The momenta and the sign of charge for the secondary particles have been determined by a measurement of magnetic curvature, after correcting for distortion. There is a large positive excess amongst the secondaries within this angular interval and it increases with increasing secondary energy. The elasticity distribution of the surviving protons has been obtained and it is found that = 0.41 ±0.05. The average transverse momentum of protons is found to be ∼ (400±50) MeV/c. By using the variation of grain density with momentum, it has been possible to identify the secondaries, and in this way the limit on the production of Σ- relative to all baryons is obtained as (2±1.5)%. The correlation between the multiplicityof an interaction and the energy given to the most energetic particle is also studied.
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