Two-Photon Production of Four-Quark States Up to the $J/ψ$ Energy

Details Two-Photon Production of Four-Quark States Up to the $J/ψ$ Energy Two-Photon Production of Four-Quark States Up to the $J/ψ$ Energy

1999-04-07

arxiv.org/abs/hep-ph/9904254v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTex, 5 pages and one PS figure. Talk presented by G.N. Shestakov at the International Workshop on e^+e^- Collisions from $\

Scientific paper

Evidence for an explicitly exotic state with isospin 2 and spin-parity 2^+ near the $\rho\rho$ threshold and nontrivial complementary indications of the unusual quark composition of the $f_0(980)$ and $a_0(980)$ states obtained from the reactions of two-photon formation of neutral meson resonances are discussed, together with puzzling phenomena in the channels $\gamma\gamma\to\rho^0\phi$ and $\gamma\gamma\to\rho^0\rho^0$ at high energies.

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