Abstract

The angular distributions of π-mesons produced in two hundred 4.5 GeV π− and two hundred 6 GeV proton interactions with emulsion nuclei have been investigated. It is found that the pions from the 6 GeV proton induced interactions are consistent with an isotropic distribution in theC-system whilst the pions from the 4.5 GeV π− induced interactions have an anisotropic distribution peaked in the forward direction. The degree of anisotropy is larger with smallerNh values.

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