Dirac phenomenology and hyperon-nucleus interactions
| Autor: | Jiří Mareš, B. K. Jennings, E.D. Cooper |
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| Jazyk: | angličtina |
| Rok vydání: | 1993 |
| Předmět: |
Physics
Particle physics Physics and Astronomy (miscellaneous) Nuclear Theory SHELL model Hyperon Nuclear physics symbols.namesake medicine.anatomical_structure Dirac fermion Dirac equation Bibliography medicine symbols Nuclear Experiment Nucleus Phenomenology (particle physics) Klein–Gordon equation Nuclear Physics |
| Popis: | We discuss various aspects of hyperon-nucleus interactions in the relativistic mean field theory. First, characteristics of Λ, Σ and Ξ hypernuclei, as well as multi-strange baryonic objects, are investigated. The spin-orbit splittings and magnetic moments are shown to be very sensitive to the value of the tensor coupling fωY. Second, optical potentials for Λ and Σ scattering off nuclei are developed based on a global nucleon-nucleus Dirac optical potential and SU(3) symmetry. The tensor coupling has a large effect on the predictions for the analyzing power. Third, the Dirac approach is used in the calculations of the non-mesonic decay of Λ hypernuclei. The large discrepancy between the decay rates and data suggests the need for additional meson exchanges. |
| Databáze: | OpenAIRE |
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