In our recent investigations, we found that the f0(975) has a large decay width about 400 MeV due to its broad third‐sheet pole and a narrow peak width about 46 MeV due to its narrow second‐sheet pole. With t‐channel ρ and f2(1275) exchange and the s‐channel resonance f0(975), we reproduce the ππ S‐wave scattering phase shift up to 1.3 GeV quite well. The broad σ(400) and f0(1400) poles are produced by t‐channel meson exchange interactions. The two members of 13P0 qq̄ nonet are suggested to be f0(975) and f0(1510). The f0(975) is dominantly ss̄ mixed with KK̄ virtual states while the f0(1510) might be (uū+dd̄) mixed with ρρ‐ωω virtual states and/or a glueball state.

Topics
Exchange interactions, Mesons, Quark models
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© 1995 American Institute of Physics.
1995
American Institute of Physics
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