Resonance $d^*(2380)$ and higher isospin states
A new isoscalar state in the two-baryon system with mass 2380 MeV and width 80 MeV denoted now $d^*(2380)$ has been detected in the experiments at the Juelich Cooler Synchrotron (COSY). Existence or influence of states with higher isospin is a subject of the experiment for studing of the $π^+π^-$ production in $pp$ collisions. Calculations taking into account isotensor dibaryon resonance in the $ΔN$ with $I(J^p) = 2(1^+)$ provide a good description of the $pp\to ppπ^+π^-$ total and differential cross sections.
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