Partial widths of a multi-channel resonance
Seminars
Seminar on Few-Body Systems
Date and Time: Tuesday, 26 September 2017, at 11:00 AM
Venue: Conference Hall (2nd floor), Bogoliubov Laboratory of Theoretical Physics
Seminar topic: «Partial widths of a multi-channel resonancen»
Speaker: Sergey A. Rakityansky (Department of Physics, University of Pretoria, South Africa)
Abstract:
It is suggested a method for finding the partial decay-widths for multi-channel resonances. The method 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 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.