K$^+$-nucleon interaction
| Autor: | Gibbs, W. R., Arceo, R. |
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| Rok vydání: | 2008 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | The Born approximation to the quark-gluon-exchange mechanism for K$^+$N scattering is used as a starting point to generate a potential for this system. The valence quark wave function of the nucleon is generalized from a single Gaussian to a sum of Gaussians in order to have a more flexible representation than previous work. We obtain a potential derived from a valence density given by lattice calculations. By comparing with a recent amplitude analysis it is found that the strength of the quark-gluon based potential needs to be increased by a factor of order 2-4 relative to the normalization given by more traditional values of the governing parameters. The method is used to estimate the change in effective K$^+$N amplitudes which would result from changes in the valence quark distributions or strength of the interaction which might arise from nuclear medium effects in K$^+$ scattering from nuclei. Comment: 30 pages 8 figures |
| Databáze: | arXiv |
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