Essential cluster "K?pp" studied with a coupled-channel Complex Scaling Method + Feshbach method

3rd International Workshop on "State of the Art in Nuclear Cluster Physics"

Dote, A.^1,2 ; Inoue, T.^3 ; Myo, T.^4,5

KEK Theory Center, Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki

305-0801, Japan^1

J-PARC Branch, KEK Theory Center, IPNS, KEK, 203-1, Shirakata, Tokai, Ibaraki

319-1106, Japan^2

Nihon University, College of Bioresource Sciences, Fujisawa

252-0880, Japan^3

General Education, Faculty of Engineering, Osaka Institute of Technology, Osaka

535-8585, Japan^4

Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki

567-0047, Japan^5

关键词: Coupled channels;    Decay widths;    Energy dependent;    Interaction parameters;    K cluster;    Single-channel;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/569/1/012084/pdf
DOI  :  10.1088/1742-6596/569/1/012084

来源: IOP

【 摘 要 】

We have investigated an essential cluster "K-pp", which is the simplest system of kaonic nuclei, with a coupled-channel Complex Scaling Method (ccCSM). Combining the ccCSM with Feshbach method we can handle a coupled-channel problem effectively as a singlechannel problem. As a result of a study of the K-pp with the ccCSM+Feshbach method using an energy-dependent chiral-theory based potential, it is found that the K-pp is shallowly bound with the binding energy of around 20-35 MeV. The mesonic decay width is rather dependent on the interaction parameters and ansatz; the half decay width is ranging from 20 to 65 MeV.