Abstract
Reanalyzing the S-wave (ππ) I=0 and (Kπ) I= 1 2 phase shifts through a new S-matrix parametrization method, the existence of σ(600) and κ(900)-particles is suggested, respectively. These particles have plausible properties as the members of scalar nonet, appeared as partners of pseudoscalar π-nonet in linear representation of chiral symmetry. The properties of the other members of σ-nonet, δ( I = 1) and σ′( s s ), are also predicted by SU(3) linear σ model(LσM). The negative background phase, introduced phenomenologically, has some correspondence to the λφ 4-interaction in LσM. Our relevant scalar-particles, “Chiralons,” should be discriminated from those in the conventional q q 3 P 0-states.
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