PION-HYPERON SCATTERING. INFLUENCE OF NON-SYMMETRIC $lambda$ AND $Sigma$ INTERACTION
Technical Report
·
OSTI ID:4231308
A field theoretical model is developed in order a study the low-energy pion scattering on LAMBDA or SIGMA hyperons, taking into account the LAMBDA - SIGMA msss difference and possible inequality of the coupling constants. From the results it is possible to study the corrections to the prediction of a theory in which LAMBDA and SIGMA are considered degenerate with respect to pion interactions. These corrections are of the order of the hyperon mass difference over the pion energy and can shift the possible resonances in an appreciable way. It is also briefly discussed which states can present resonances for particular choices of the coupling constants. (auth)
- Research Organization:
- European Organization for Nuclear Research, Geneva
- NSA Number:
- NSA-13-016406
- OSTI ID:
- 4231308
- Report Number(s):
- NP-7701
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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