Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8200811 | Physics Letters B | 2006 | 7 Pages |
Abstract
The kaon nuclear optical potential is studied including the effect of the Î+ pentaquark. The one-nucleon contribution is obtained using an extension of the Jülich meson-exchange potential as bare kaon-nucleon interaction. Significant differences between a fully self-consistent calculation and the usually employed low-density TÏ approach are observed. The influence of the one-nucleon absorption process, KNâÎ+, on the kaon optical potential is negligible due to the small width of the pentaquark. In contrast, the two-nucleon mechanism, KNNâÎ+N, estimated from the coupling of the pentaquark to a two-meson cloud, provides the required amount of additional kaon absorption to reconcile with data the systematically low K+-nucleus reaction cross sections found by the theoretical models.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Laura Tolós, Daniel Cabrera, Angels Ramos, Artur Polls,