DOI: 10.1140/epja/i2002-10083-y
coupling effects in light hypernuclei
Khin 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
akaishi@post.ket.jp
(Received: 17 July 2002 / Revised version: 24 September 2002 / Published online: 17 January 2003)
Abstract
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