Abstract
Using the ARGUS detector at the e +e − storage ring DORIS II at DESY, we have observed parity violation in the decay Λ ± c → Λπ ±. We measure the coefficient of parity violation, α Λc , to be −0.96±0.42. In addition, we measure σ BR ( Λ + c → Λπ + and σ BR ( Λ + c → Σ 0 π +) to be, respectively, (2.2±0.3±0.4) pb and (2.0±0.7±0.4) pb.
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