Elsevier

Nuclear Physics A

Volume 508, 19–26 February 1990, Pages 385-394
Nuclear Physics A

Hyperon-nucleon interaction and the H-dibaryon in the quark cluster model

https://doi.org/10.1016/0375-9474(90)90502-DGet rights and content

Abstract

The non-relativistic cluster model is used to describe the hyperon-nucleon (ΛN, ΣN) and hyperon-hyperon (H-dibaryon) interaction. Including central and tensor parts of the one-gluon exchange, pseudoscalar-meson exchange plus an additional phenomenological σ-meson exchange, a very good fit of the experimental hyperon-nucleon cross-sections is achieved. Applying this model to the H-dibaryon, a bound state with a binding energy of (−15 ± 5) MeV below the ΛΛ threshold is found, i.e. the mass of the H-dibaryon is predicted to be around 2216 MeV.

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Supported by the Deutsche Forschungsgemeinschaft.

§

Institute of High Energy Physics, Academia Sinica, Beijing, China.

Physical Research Laboratory, Ahmedabad, India.

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