The Use of Analyticity in the ππ and K K Coupled Channel System
Xiao, Zhiguang · Zheng, Hanqing
Original · EN
Studies on the IJ=00 ππ and K K coupled--channel system are made using newly derived dispersion relations between the phase shifts and poles and cuts. It is found that the σ resonance must be introduced to explain the experimental phase shifts, after evaluating the cut contribution. The effects of nearby branch point singularities to the determination of the f₀(980) resonance are also carefully clarified.
English translation
This paper has no Arabic translation yet. Be the first: it takes a few seconds, and the result is stored for every future reader.