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Properties of the kaon-nucleon system and $$Lambda(1405)$$ in the Skyrme model

Ezoe, Takashi; Hosaka, Atsushi; Maruyama, Toshiki  

The kaon-nucleon systems and the $$Lambda(1405)$$ has been receiving a lot of attention in hadron physics. For example, the antikaon and nucleon interaction is considered strongly attractive. Due to the strong attraction, they form a bound state which was identified with the $$Lambda(1405)$$. It is one of the most famous resonance states whose detailed properties are yet under debate in hadron physics. In this study, we have investigated the kaon-nucleon systems and the $$Lambda(1405)$$ in the Skyrme model, where the baryon is described as a soliton with the finite structures. As a result, we have obtained the (anti)kaon-nucleon potential as a function depending on the radial distance and we discuss the decay of the $$Lambda(1405)$$ taking into account the baryon structures.

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