THE $lambda$-HYPERON-NUCLEON PROBLEM FROM MESON THEORY
Journal Article
·
· Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B
OSTI ID:4304434
A discussion of the implications of the meson theory with regard to the binding of the LAMBDA -hyperon in nuclear matter is carried out taking explicitly into account the phenomenological results of Dalitz and Downs. The interactions through pions and K mesons are analyzed, considering all possible combinations of the parity of the SIGMA hyperon and the K meson. Particular attention is devoted to the case of a universal pion-baryon interaction. In this case one is led to the conclusion that the K meson is pseudoscalar. Another solution to the problem can be obtained assuming that the SIGMA hyperon has different parity from that of the LAMBDA hyperon. This implies that the Kmeson contribution to the LAMBDA nucleon potential is of the same order of magnitude as that of the pion field. It is argued that no other solutions can be given. In particular the interaction through the K-meson field only is not able to give agreement with experiment. The stability of the ( XI , nucleon) and ( SIGMA , nucleon) systems are also briefly discussed. (auth)
- Research Organization:
- Univ. of Padua and Univ. of Trieste
- NSA Number:
- NSA-13-000403
- OSTI ID:
- 4304434
- 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) 9; ISSN NUCIA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
BINDING ENERGY-- LAMBDA PARTICLES-- MESONS-- NUCLEAR STRUCTURE-- NUCLEI
HYPERONS-- INTERACTIONS-- NUCLEONS-- PIONS-- PSEUDOSCALAR-- VECTORS
INTERACTIONS- - KAONS-- LAMBDA PARTICLES-- MEASURED VALUES-- NUCLEONS-- PARITY-- SIGMA PARTICLES
INTERACTIONS-- KAONS-- PARITY-- PIONS-- SIGMA PARTICLES
NUCLEONS-- SIGMA PARTICLES-- STABILITY
NUCLEONS-- STABILITY-- XI PARTICLES
PHYSICS AND MATHEMATICS
HYPERONS-- INTERACTIONS-- NUCLEONS-- PIONS-- PSEUDOSCALAR-- VECTORS
INTERACTIONS- - KAONS-- LAMBDA PARTICLES-- MEASURED VALUES-- NUCLEONS-- PARITY-- SIGMA PARTICLES
INTERACTIONS-- KAONS-- PARITY-- PIONS-- SIGMA PARTICLES
NUCLEONS-- SIGMA PARTICLES-- STABILITY
NUCLEONS-- STABILITY-- XI PARTICLES
PHYSICS AND MATHEMATICS