Interaction of the $Θ^+$ with the nuclear medium

Abstract

We study the selfenergy of the $Θ^+$ pentaquark in nuclei associated with two types of interaction: the KN decay of the $Θ^+$ and two meson baryon decay channels of the $Θ^+$. Whereas the potential related to the first source is quite weak, the second kind of interaction produces a large and attractive potential that could lead to the existence of $Θ^+$ nuclear bound states.

8 pages, 6 figurs, talk presented at the International Workshop PENTAQUARK04 July 20-23, 2004, SPring-8, Japan