Approach to quasi-resonant processes

In this paper an approach to quasi-resonant processes is presented, by developing a method of generalized reduced (K)- and collision-matrices. It is proved that a single channel resonance can induce, via direct interaction coupling, quasi-resonant structures in competing reaction channels. The magnitude of the quasi-resonant process is proportional both to strengths of single channel resonance and of direct coupling. A direct compression of the quasi-resonance's width is evidenced. Its width is smaller than the width of originating single channel resonance