A study of $\pi^{pm9}$Be sections, and determination of the$\pi^{9}$Be coupling constant

Calculates the total cross sections for pi /sup +or-/ /sup 9/Be scattering in the Glauber model for two different nuclear models, a single-nucleon model and a cluster model. The cluster model gives much smaller cross sections than the single-nucleon model. Applying forward dispersion relations to the antisymmetric pi /sup 9/Be amplitude, the pi /sup 9/Be coupling constant is determined as (f/sup 2/)/sub eff /=0.04+or-0.01. (31 refs)