DISPERSION RELATIONS FOR PION-HYPERON PRODUCTION AND A POSSIBLE PION- HYPERON RESONANCE

Journal Article · Thu Sep 01 04:00:00 EDT 1960 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.119.1753· OSTI ID:4146938

Capps, R H

Approximate P-wave dispersion relations are derived, but not proved, for the processes bar-K + N - pi + SIGMA (or A) under the assumption that all pion-baryon and K-baryon interactions are of the odd intrinsic-parity, Yukawa type. By comparing these equations with the analogous equations for pion-hyperon scattering, it is shown that a low-energy resonance is likely to occur in a particular combination of the isotopic spin one, P/sub 3 2 9/ pi + LAMBDA , and pi + SIGMA scattering states; and this resonance should be recognizable in the pi + Y production processes. Despite complications associated with the unphysical region in the pi + Y production dispersion relations and with the fact that the K interactions are moderately strong, the resonance should occur in the production process in a direct and simple way. Measurements of the cross section for production of this resonance state can give information about the strengths of the strong interactions, particularly the pion-baryon interactions. The present experimental evidence concerning the existence of such a resonance effect in pi + Y production is favorable, but inconclusive. A short discussion is given of the additional experimental information needed to test the resonance hypothesis. (auth)

• Research Organization: Cornell Univ., Ithaca, N.Y.
• NSA Number: NSA-14-024791
• OSTI ID: 4146938
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 119; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANTIKAONS
ANTIMESONS
BARYONS
CROSS SECTIONS
DISPERSION RELATIONS
ELEMENTARY PARTICLES
EQUATIONS
FIELD THEORY
HYPERONS
INTERACTIONS
ISOSPIN
KAONS
LAMBDA PARTICLES
NUCLEONS
PARITY
PARTICLE MODELS
PHYSICS
PIONS
PRODUCTION
RESONANCE
SCATTERING
SIGMA PARTICLES