Anuglar distribution of shower particles produced in the collisions of 20-GeV/c and 300-GeV negative pions with emulsion nuclei

Physics – Nuclear Physics

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Angular Distribution, Cosmic Ray Showers, Nuclear Emulsions, Nuclei (Nuclear Physics), Particle Collisions, Pions, Energy Spectra, Kinematics, Particle Acceleration, Particle Mass, Protons, Regression Coefficients, Scaling Laws

Scientific paper

For 435 accelerator produced antipions jets of 20 GeV/c and 300 GeV, in nuclear emulsion, eta(theta)'s have been individually calculated for each jet, where eta(theta) is a kinematic parameter introduced in order to approximate the LS (laboratory system) rapidity, eta = arctan h (beta cos theta). By taking further averages by dividing the samples into groupings of the LS energy Epi = m cos h etapi Nh, the number of heavy prongs with LS velocity beta 0.7, and n , the number of charged shower particles with LS velocity beta 0.7, much less than eta (theta) much greater than are obtained. By use of the KNO (Koba-Nielsen-Olesen) scaling variable, xi = ns/,n sub s. good fit is found of data to regression function.

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