Speaker
Description
The WASA@COSY collaboration observed in the total cross section of reaction $pn->dπ^0π^0$ a clear dibaryon resonance in a non-strange sector with a mass of 2380 MeV and a remarkably narrow width of 70 MeV [1]. Later on the ANKE@COSY also found indications to excitation of this dibaryon in other reaction, $pd->pdππ$ [2]. For explanation of the ANKE@COSY data we applied the two-resonance model [3] to the reaction by inclusion of the $t-$channel $σ-$meson exchange between the proton and deuteron [4]. In this talk we extend the model [4] of the reaction $pd-pdππ$, taking into account the recent results of Ref. [5], where the $Δ(1232)Δ(1232)$ resonances channel was introduced in addition to the $d^*(2380)-> D(2150)+π-> d+ ππ$ and $d^*(2380)-> d+σ->d+ππ $ channels of the decay of the $d^*(2380)$ resonance in describing the reaction $pn->dπ^0π^0$.
The research is supported under the grant № 411 of the Scientific Program JINR – Republic of Kazakstan.
[1] P. Adlarson et al., Phys. Rev. Lett. 106, 242302 (2011).
[2] V.I. Komarov, et al. Eur. Phys. J. A 54, 206 (2018).
[3] M.N. Platonova, V.I. Kukulin, Phys. Rev. C 87, 025202 (2013).
[4] Yu.Uzikov, N. Tursunbayev, EPJ Web of Conferences 204, 08010 (2019)
[5] M. N. Platonova, V. I. Kukulin, Phys. Rev. D 103, 114025 (2021)
