Status of d*(2380) and search for further dibaryon resonances

After evidence for the existence of a narrow dibaryon resonance with I(J^P) = 0(3⁺) had been found in various np-induced two-pion production channels, its pole has been identified now in polarized vector np scattering. This qualifies the resonance as a genuine s-channel dibaryon resonance, denoted since then by d*(2380) [1]. Meanwhile, also all two-pion decay channels have been studied and decay branchings deduced. Several new theoretical investigations in the framework of Faddeev or quark model treatments see this state at a mass close to the experimentally observed one - and partly also with the right width. Amazingly, the first prediction by Dyson and Xuong based on SU(6) symmetry breaking turns out to have been already very close. These theoretical studies predict also another truly exotic state with mirrored quantum numbers I(J^P) = 3(0⁺), i.e. decoupled from the NN system and consisting of just six up-quarks in its I_z = +3 state. Such a state may be searched for in four-pion production. The status of this search by use of WASA data will be reported.