### $pi$sup +$-p INTERACTIONS IN THE ENERGY RANGE AROUND 500 Mev$pi$sup +$-p INTERACTIONS IN THE ENERGY RANGE AROUND 500 Mev

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 Author Blevins, M. E. ♦ Block, M. M. ♦ Leitner, J. Source United States Department of Energy Office of Scientific and Technical Information Content type Text Language English
 Subject Keyword PHYSICS AND MATHEMATICS ♦ ANGULAR DISTRIBUTION ♦ CLOUD CHAMBERS ♦ CROSS SECTIONS ♦ DIFFUSION CHAMBERS ♦ DISPERSION RELATIONS ♦ ENERGY RANGE ♦ FIELD THEORY ♦ HYDROGEN ♦ INTERACTIONS ♦ MEASURED VALUES ♦ PIONS ♦ PIONS-PLUS ♦ PROTONS ♦ QUANTUM MECHANICS ♦ SCATTERING ♦ SCATTERING AMPLITUDE ♦ SPECTRAL SHIFT Abstract >A hydrogen-filled diffusion cloud chamber investigation of pi /sup +/- p interactions in the energy range around 500 Mev is reported. The elastic scattering angular distribution, based on a total of 180 events, is analyzed using only s and p waves, and also using s and p waves with a d-wave interference term. Phase shifts are presented and ambiguities are discussed. The dwave contribution is small. The elastic cross section is used to compute the real part of the forward coherent scattering amplitude. The latter is in good agreement with that predicted by the dispersion relations. Inelastic production sets in at about 300 Mev. Eighteen inelastic events were found; 7 were p + 0, 7 were n/sup ++/, and 4 were unidentifiable. Inelastic processes are discussed in terms of various models. (auth) ISSN 0031899X Educational Use Research Learning Resource Type Article Publisher Date 1958-11-15 Publisher Department Duke Univ., Durham, N.C. Journal Physical Review Volume Number 112 Organization Duke Univ., Durham, N.C.