Predicted branching ratio for π−d → π0nn at rest

Abstract

The branching ratio for rest capture π−d → π0nn is calculated using the impulse approximation for π0nn and data for other rates. Detailed discussion is devoted to corrections to the simplest approximation, and to relevant details of the deuteron description. The result for the predicted branching ratio is (1.46 ± 0.25) × 10−4.