Low-energy
d-resonance
N.V. Shevchenko1,3 - V.B. Belyaev1,2 - S.A. Rakityansky2 - S.A. Sofianos2 - W. Sandhas4
1 Joint Institute for Nuclear Research, Dubna, 141980, Russia
2 Physics Department, University of South Africa,
P.O. Box 392, Pretoria 0003, South Africa
3 Physics Department, Irkutsk State University, Irkutsk 664003, Russia
4 Physikalisches Institut, Universität Bonn, D-53115 Bonn, Germany
Received: 12 June 2000
Communicated
by W. Weise
Abstract
Elastic -scattering is considered within the
Alt-Grassberger-Sandhas (AGS) formalism for various
input data. A
three-body resonant state is found close to the
threshold. This
resonance is sustained for different choices of the two-body
-scattering length
.
The position of the resonance moves towards
the
threshold when
is increased, and turns
into a quasi-bound state at
0.7-0.8fm
Copyright Società Italiana di Fisica, Springer-Verlag 2000