Resonance $d^{\ast }(2380)$ and higher isospin states

A new isoscalar state in the two-baryon system with mass 2380 MeV and width 80 MeV denoted now $d^{\ast }(2380)$ 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 ${\pi }^{+}{\pi }^{-}$ production in $pp$ collisions. Calculations taking into account isotensor dibaryon resonance in the $\mathrm{\Delta }N$ with $I(J^p)=2(1^{+})$ provide a good description of the $pp\to pp{\pi }^{+}{\pi }^{-}$ total and differential cross sections.