Large-Angle Scattering of FastμMesons

Abstract

Experiments on cosmic-ray $\mu$ mesons over the past seven years have appeared to show "anomalous" scattering. This anomaly is a small excess of large-angle scattering over that expected on current nuclear models. A recent experiment by Fukui, Kitamura, and Watase has failed to show the anomaly. In the present paper the data given by Fukui et al. are re-examined and it is shown that their experiment is in-conclusive.