TY  - JOUR
A1  - Tolós, Laura
A1  - Cabrera, Daniel
A1  - Ramos, Angels
A1  - Polls, Artur
T1  - The effect of the in-medium Θ+ pentaquark on the kaon optical potential
T2  - Physics Letters B
N2  - The kaon nuclear optical potential is studied including the effect of the Θ+ 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 Tρ approach are observed. The influence of the one-nucleon absorption process, KN→Θ+, on the kaon optical potential is negligible due to the small width of the pentaquark. In contrast, the two-nucleon mechanism, KNN→Θ+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.
KW  - KN interaction
KW  - K+-nucleus interaction
KW  - Θ+ pentaquark
KW  - Heavy-ion collisions
Y1  - 2005
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/76253
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-762538
SN  - 0370-2693
VL  - 632.2006
IS  - 2
SP  - 219
EP  - 225
PB  - Elsevier
CY  - Amsterdam
ER  -