HYPERON-NUCLEON FORCES FROM MESON THEORY

Journal Article · Mon Oct 31 04:00:00 EST 1960 · Intern. Conf. Mesons and Recently Discovered Particles e 43 Congr. naz. fis. Padua-Venice, 1957, Commun.

OSTI ID:4190839

Lichtenberg, D B; Ross, M

A theoretical investigation is made of the forces between hyperons and nucleons, assuming that the forces are due to the exchange of pi and K mesons. It is assumed that LAMBDA and SIGMA hyperons have spin 1/2 and the same parity and that the K has spin zero. Then, if the strength of the pion coupling is the same for all baryons, the hyperon-nucleon forces can be given in terms of linear combinations of empirically determined nucleon-nucleon forces (neglecting baryon mass differences). In this case the pion forces alone seem to be able to account for about 80% of the potentials which are necessary to produce the observed binding in hyperfragments. This number is quite rough because of the uncertainties in the pion forces and in making predictions about the two-body forces from hyperfragment data. Furthermore, the pion forces alone may be sufficient to bind the SIGMA /sup +/-proton system. Corrections to the potentials due to baryon mass differences and to the effects of K particles are also discussed. The result of a perturbation calculation of the potentials due to K exchange indicate that for the K coupling constants of the order of unity (for scalar or pseudoscalar K) the pion potentials still strongly dominate. (auth)

• Research Organization: Univ. of Hamburg; Indiana Univ., Bloomington
• NSA Number: NSA-14-010015
• OSTI ID: 4190839
• Journal Information: Intern. Conf. Mesons and Recently Discovered Particles e 43 Congr. naz. fis. Padua-Venice, 1957, Commun., Journal Name: Intern. Conf. Mesons and Recently Discovered Particles e 43 Congr. naz. fis. Padua-Venice, 1957, Commun. Vol. Vol: IX
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
ACIDITY
BARYONS
BINDING ENERGY
COLOR
COUPLING
DYES
HYPERFRAGMENTS
HYPERONS
INTERACTIONS
KAONS
LAMBDA PARTICLES
MASS
MESONS
MORIN
NUCLEAR THEORY
NUCLEONS
PARITY
PARTICLE MODELS
PERTURBATION THEORY
PHYSICS
PIONS
PYROCATECHIN VIOLET
QUANTITATIVE ANALYSIS
SIGMA PARTICLES
SIGMA-PLUS
SPECTRA
SPECTRAL SHIFT
SPIN
TANTALUM
TANTALUM COMPLEXES