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pi. /sup 12/C interaction at p/sub rho-/ = 40 GeV/c accompanied by the emission of cumulative pions
A.I. Anoshin, V.B. Lyubimov, M.I. Solov'ev, M.K. Suleimanov, D. Tuvdendorzh
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Abstract
In (1.0 +- *0.1)% of the interactions of ..pi../sup -/ mesons (p..pi../sup -/= 40 GeV/c) with carbon nuclei, pions are observed at energies above those allowed kinematically for pion-nucleon interactions. In 80% of the cases, these pions are emitted into the rear hemisphere of the laboratory system, and in 90% of the cases they are positively charged. In events with cumulative pions, the multiplicity of all charged secondaries increases, and the probability for complete disintegration of the carbon nucleus increases by a factor approx. =5. The inclusive pion spectrum is exponential, with a slope parameter lower than that for cumulative protons by a factor of 5--7.