Building the Nucleus From Quarks: the Cloudy bag Model and the Quark Description of the Nucleon-nucleon Wave Functions
Jan, 1984135 pages
Published in:
- Int.Rev.Nucl.Phys. 1 (1984) 189-323
Report number:
- DOE-ER-40048-02-N4
Citations per year
Abstract: (World Scientific)
In the Cloudy Bag Model hadrons are treated as quarks confined in an M.I.T. bag that is surrounded by a cloud of pions. Computations of the charge and magnetism distributions of nucleons and baryons, pion-nucleon scattering, and the strong and electromagnetic decays of mesons are discussed. Agreement with experimental, results is excellent if the nucleon bag radius. is in the range between 0.8 and 1.1 fm. Underlying qualitative reasons which cause the pionic corrections to be of the obtained sizes are analyzed. If bags are of such reasonably large sizes, nucleon bags in nuclei will often come into contact. As a result one needs to consider whether explicit quark degrees of freedom are relevant for Nuclear Physics. To study such possibilities a model which treats a nucleus as a collection of baryons, pions and six-quark bags is discussed. In particular, the short distance part of a nucleon-nucleon wave function is treated as six quarks confined in a bag. This approach is used to study the proton-proton weak interaction, the asymptotic D to S state ratio of the deuteron, the pp →dπ reaction, the charge density of 3He, magnetic moments of 3He and 3H and, the 3He-3H binding energy difference. It is found that quark effects are very relevant for understanding nuclear properties.- REVIEW
- NUCLEAR MODEL
- MODEL: BAG
- CURRENT ALGEBRA
- NUCLEON: FORM FACTOR
- FORM FACTOR: NUCLEON
- VERTEX FUNCTION: (2NUCLEON PI)
- NUCLEON NUCLEON: WAVE FUNCTION
- P P: INTERACTION
- INTERACTION: P P
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