PION-HYPERON SCATTERING. INFLUENCE OF NON-SYMMETRIC $lambda$ AND $Sigma$ INTERACTION

Journal Article · Wed Sep 16 04:00:00 EDT 1959 · Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B

OSTI ID:4216884

Amati, D; Stanghellini, A; Vitale, B

A field theoretical model is developed to study the low-energy pion scattering on LAMBDA or SIGMA hyperons, taking into account the LAMBDA - SIGMA mass 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. The relations of the previous results to the K/sup -/-N absorption are discussed from a qualitative point of view. (auth)

• Research Organization: European Council for Nuclear Research, Geneva
• NSA Number: NSA-14-002909
• OSTI ID: 4216884
• Journal Information: Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B, Journal Name: Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B Vol. Vol: (10) 13; ISSN NUCIA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COUPLING
FIELD THEORY
HYPERONS
INTERACTIONS
LAMBDA PARTICLES
MASS
PARTICLE MODELS
PHYSICS
PIONS
RESONANCE
SCATTERING
SIGMA PARTICLES
SPECTRAL SHIFT