The 0++ States
The data show five isoscalar resonances: f0(600), f0(980), f0(1370), f0(1500), and f0(1710). Of these the f0(600) is usually identified with the σ of chiral models. The decays and production of f0(1710) give strong evidence that it is also a meson.
Read more about this topic: Exotic Meson
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