Structure of T- and S-matrices in unphysical sheets and resonances in three-body systems
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Algorithm, based on explicit representations for the analytic continuation of Faddeev components of the three-body T-matrix in unphysical energy sheets, is employed to study mechanism of disappearance and formation of the Efimov levels of the helium ^4He trimer.
LaTeX (fbssuppl style), 10 pages, 2 eps figures; Plenary talk at the 16th European Conference on Few-Body Problems in Physics, Autrans (France), June 1-6, 1998. Journal-ref. has been added
LaTeX (fbssuppl style), 10 pages, 2 eps figures; Plenary talk at the 16th European Conference on Few-Body Problems in Physics, Autrans (France), June 1-6, 1998. Journal-ref. has been added