Observation of Unpolarized Λ's Produced by 1.5-Bev π- Interactions in Pb, Fe, and C Bowen, Theodore ; Hardy, Judson ; Reynolds, George T. ; Tagliaferri, Guido ; Werbrouck, Albert E. ; Moore, William H. Abstract Publication: Physical Review Letters Pub Date: July 1958 DOI: 10.1103/PhysRevLett.1.11 Bibcode: 1958PhRvL...1...11B