Abstract:
A new method for finding the partial decay-widths for multi-channel resonances
is suggested. It is based on using the Jost matrices. These matrices can be either calculated
(when the multi-channel potential is known) or found by fitting experimental data (when they
are available). In both cases the procedure for obtaining the partial widths is the same and is
simple. It does not require any kind of integration or differentiation. The partial widths sum
up to the total width and the corresponding branching ratios can be found as some algebraic
combinations of the elements of the Jost matrices.
