6533b86ffe1ef96bd12ce845
RESEARCH PRODUCT
The effect of the in-medium Θ+ pentaquark on the kaon optical potential
Angels RamosDaniel CabreraLaura TolosArtur Pollssubject
Heavy-ion collisionsPhysicsCouplingΘ+ pentaquarkNuclear and High Energy PhysicsParticle physicsNuclear TheoryNuclear TheoryKN interactionK+-nucleus interactionNuclear matterOptical potentialPentaquarkNuclear physicsHigh Energy Physics - Phenomenologymedicine.anatomical_structureExotic baryonmedicineHigh Energy Physics::ExperimentNuclear ExperimentNucleonAbsorption (electromagnetic radiation)Nucleusdescription
The kaon nuclear optical potential is studied including the effect of the $\Theta^+$ pentaquark. The one-nucleon contribution is obtained using an extension of the J\"ulich meson-exchange potential as bare kaon-nucleon interaction. Significant differences between a fully self-consistent calculation and the usually employed low-density $T\rho$ approach are observed. The influence of the one-nucleon absorption process, $K N \to \Theta^+$, on the kaon optical potential is negligible due to the small width of the pentaquark. In contrast, the two-nucleon mechanism, $K N N \to \Theta^+ N$, 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-03-01 | Physics Letters B |