THE MODEL-INDEPENDENT ANALYSIS INDICATIONS FOR SPECTROSCOPY OF SCALAR MESONS. PROOF FOR THE K_0~*(900)

摘要

In a model-independent approach the data on ππ→ππ, KK, ηη, ηη' in the I~G J~(PC) = 0~+0~(++) channel and on the K_π scattering in the I(J~P) = (1/2)(0~+) channel are analyzed jointly for studying the status and QCD nature of the f_0 and the K_0~* mesons. It is shown that in the 1500-MeV region, there are two states, wide (interpreted as a glueball) and narrow (qq). In the Kπ-scattering data analysis, the proof for the K_0~* (900) is given.