The Attenuation Cross Sections Of 37 Mev Pions In Hydrogen PDF Download

The total scattering cross sections for positive and negative pions on hydrogen was measured at intervals from 450 to 1650 Mev. Six scintillation counters measured the transmission of pions at various solid angles, and the results were extrapolated to zero solid angle. Two peaks previously discovered in the pi /sup -/-p cross section were measured and found centered at 600 plus or minus 15 and 900 plus or minus 15 Mev. A broad maximum was observed ln the pi /sup +/-p cross section at approx 1350 Mev. A "shoulder" at approximately 800 Mev, in a region where the pi /sup +/-p cross section is rapidly rising, gives some support to speculation that there is a resonant state at this energy. (auth).