A Test of the Charge Symmetry Hypothesis: Positive to Negative Pion Production Ratio Obtained in Bombarding Carbon with Alpha-Particles and Protons

15 February 1953

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 89 (4) , 758-759
https://doi.org/10.1103/physrev.89.758

Abstract

A measurement of the plus/minus ratio for the production of pions by alpha-particles incident on carbon nuclei has been carried out to test the charge symmetry hypothesis. Employing an experimental procedure which eliminates residual errors in geometry, etc., the ratio was found to be 0.72±0.17. The alpha-particle energy was 375 Mev and the meson energy was 15 Mev observed at 90° to the beam. Coulomb effects are expected to bring about a depression of the production ratio from unity of about this magnitude. The experimental result, therefore, provides support for the charge symmetry hypothesis.

Keywords

This publication has 3 references indexed in Scilit:

Production Cross Sections for $π^{+}$ - and $π^{-}$ -Mesons by 340-Mev Protons on Carbon and Lead at 90° to the Beam
Physical Review B, 1952
Cross Section for Production of Charged $π$ -Mesons in C and H at 90° to a 381-Mev Proton Beam
Physical Review B, 1951
On the Relative Production of $π^{+}$ - and $π^{-}$ - Mesons by Neutrons
Physical Review B, 1950