Specification of Kowalski-Noyesfratios for coupled channels
P. J. Dortmans, Ken Amos · Physical Review C · 1993
We show that by a slight redefinition, the (real) Kowalski-Noyes f ratios can be defined for coupled as well as uncoupled channels, and, with this, we find a separable representation of t matrices whose complex nature is dependent only on on-shell observables.