General DLNP seminar by Yu. N. Uzikov, 20 June 2018
Its closeness to the formation threshold of two Δ(1232) isobars suggests that the observed resonance has a quasi-molecular ΔΔ-structure while its unusually narrow width indicates a possible dibaryon (six-quark) nature. This observation stimulated calculations using both quark models and πNΔ-dynamics. The ANKE@COSY collaboration observed a resonance with a mass of 2380 MeV in the reaction pd→pdππ beyond the quasi-elastic kinematics and two isovector resonances in the reaction pp→{pp}sπ0 with the formation of a 1S0-diproton. Theoretical calculations of cross sections for these reactions with allowance for excitation of the Δisobar, N*(1440), D12(2150) were reported. A brief review of the talks on exotic hadron systems at the MESON-2018 conference (Krakow, 7–12 June2018) was also given.
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