coupling effects in light hypernucleiKhin Swe Myint1, S. Shinmura2 and Y. Akaishi3
1 Department of Physics, Mandalay University, Mandalay, Union of Myanmar
2 Department of Information Science, Gifu University, Gifu 501-1193, Japan
3 Institute of Particle and Nuclear Studies, KEK, Tsukuba 305-0801, Japan
(Received: 17 July 2002 / Revised version: 24 September 2002 / Published online: 17 January 2003)
The significance of - coupling in double- hypernuclei has been studied. The Pauli suppression effect due to this coupling in has been found to be 0.43 MeV for the coupling strength of the NSC97e potential. This indicates that the free-space interaction is stronger by an about phase shift than that deduced from the empirical data of without including the Pauli suppression effect. In and , an attractive term arising from the - conversion is enhanced by the formation of an alpha-particle in the intermediate states. According to this enhancement, we have found that the binding energy ( ) of is about 0.27 MeV larger than that of for the NSC97e coupling strength. This finding deviates from the general picture that the heavier is the core nucleus, the larger is .
21.80.+a - Hypernuclei.
21.10.Dr - Binding energies and masses.
21.45.+v - Few-body systems.
© Società Italiana di Fisica, Springer-Verlag 2003