Charge-asymmetry effects in Λ- $$\Lambda - \mathcal{N}$$ scattering
| Autor: | R. J. N. Phillips, B. W. Downs |
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| Rok vydání: | 1966 |
| Předmět: | |
| Zdroj: | Il Nuovo Cimento A Series 10. 41:374-379 |
| ISSN: | 1826-9869 0369-3546 |
| DOI: | 10.1007/bf02756443 |
| Popis: | A phenomenological, charge-symmetry-breaking (CSB) Λ-\(\Lambda - \mathcal{N}\) potential is deduced from the\(^4 He_\Lambda - ^4 H_\Lambda \) binding-energy difference. This is added to charge-symmetric (CS) potentials deduced from\(^3 H_\Lambda \) and\(^5 He_\Lambda \), and applied to Λ-\(\Lambda - \mathcal{N}\) scattering for two possible choices of CSB potential parameters. In one case, a CS singlet scattering length −3.5 fermi is changed to −5.4 fermi for Λ-p and to −2.5 fermi for Λ-n. Different combinations of CSB parameters affect theJ=0 ground states andJ=1 excited states of the four-body hypernuclei; observation of the latter could fix the CSB spin-dependence. CSB effects in final-state interactions are also discussed. |
| Databáze: | OpenAIRE |
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