Non-strange dibaryons
Conference
·
· AIP Conf. Proc.; (United States)
OSTI ID:5954871
The experimental evidence for two-nucleon structures is reviewed. Narrow resonances are not consistently observed in different experiments. Although the main theoretical interest is in the possibility that such structures are evidence of six-quark states, it is shown that the broad structures are better understood as coupled channel or threshold effects due to isobar coupling. R-matrix theory is used to predict the positions and character of resonances that are due to coupling the two-hadron channels to asymptotically free multi-quark states at short distances. The lowest such resonances in the nucleon-nucleon system are predicted to be in /sup 1//sup /S/sub 0/ and /sup 3//sup /S/sub 1/ partial waves with masses between 2.4 GeV and 3.4 GeV. These resonances are shown to be dominated by the short range 6-quark wavefunction. Their origin is identifiable by their approximately 50 MeV widths, by the /sup 1//sup /S/sub 0/, /sup 3//sup /S/sub 1/ mass difference of about 70 MeV and by their strong coupling to the S-wave ..delta delta.. channel. Implications for other 2-nucleon partial waves and other 2-hadron systems are briefly stated.
- Research Organization:
- Massachusetts Institute of Technology, Cambridge, MA 02139
- OSTI ID:
- 5954871
- Report Number(s):
- CONF-8503120-
- Conference Information:
- Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 133:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645204 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
653001* -- Nuclear Theory-- Nuclear Structure
Moments
Spin
& Models
653003 -- Nuclear Theory-- Nuclear Reactions & Scattering
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BAG MODEL
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
CLUSTER MODEL
COMPOSITE MODELS
DIBARYON RESONANCES
EXTENDED PARTICLE MODEL
HADRON REACTIONS
ISOBARIC NUCLEI
MATHEMATICAL MODELS
MATTER
MESON REACTIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PARTIAL WAVES
PARTICLE MODELS
PARTICLE PROPERTIES
PION REACTIONS
PROTON REACTIONS
QUARK MATTER
QUARK MODEL
S WAVES
STRANGENESS
653001* -- Nuclear Theory-- Nuclear Structure
Moments
Spin
& Models
653003 -- Nuclear Theory-- Nuclear Reactions & Scattering
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BAG MODEL
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
CLUSTER MODEL
COMPOSITE MODELS
DIBARYON RESONANCES
EXTENDED PARTICLE MODEL
HADRON REACTIONS
ISOBARIC NUCLEI
MATHEMATICAL MODELS
MATTER
MESON REACTIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PARTIAL WAVES
PARTICLE MODELS
PARTICLE PROPERTIES
PION REACTIONS
PROTON REACTIONS
QUARK MATTER
QUARK MODEL
S WAVES
STRANGENESS