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Study of Negative Sigma-hyperon and Proton Inelastic Interaction With Negative Sigma Momentum From 0 to 650 Mev/c
Abstract
The reaction E+p+A+n and E+p+2°+n were studied using 2402 visible polarized E produced by the reaction K+p+ with the center of mass energy in the vicinity of the Y(1520) resonance. The capture ratios for stop ping and in-flight E were measured, and were all about 0.5.The cross-sections were obtained for both reactions at lab. momenta from 1 to 650 MeV/c. The results indicated that in the momentum ranged of 1 to 120 MeV/c the cross-sections were much larger than the S-wave absorption limits, indicating a constructive interference between the Coulomb and nuclear interactions.The crosssections in the momentum range of 120-400 MeV/c followed very closely the S-waveption limits. The angulardistributions showed definite non-isotropy in this region, indicating the presence of P and D waves. Two enhancement were found in the cross-sections in the momentum range of 400 and 650 MeV/c. They were observed at 2171 and 2191 MeV Σp center of mass energies. Insufficient data prevented a Breit-Wigner fit to these enhancements.The polarization of the outgoing A was measured w.r.t. to the incoming polarization direction.
Subject Area
Particle physics
Recommended Citation
STEPHEN, DAVID, "Study of Negative Sigma-hyperon and Proton Inelastic Interaction With Negative Sigma Momentum From 0 to 650 Mev/c" (1970). Doctoral Dissertations Available from Proquest. AAI7102729.
https://scholarworks.umass.edu/dissertations/AAI7102729