Theoretical analysis of resonance states in $^{4}H$, $^{4}He$ and   $^{4}Li$ above three-cluster threshold
  The resonance states of $^{4}H$, $^{4}He$ and $^{4}Li$, embedded in the three-cluster $d+N+N$ continuum, are investigated within a three-cluster model. The model treats the Pauli principle exactly and incorporates the Faddeev components for proper description of the boundary conditions for the two- and three-body continua. The hyperspherical harmonics are used to distinguish and numerate channels of the three-cluster continuum. It is shown that the effective barrier, created by three-cluster configuration $d+N+N$, is strong enough to accommodate two resonance states. 
V. Vasilevsky (1), F. Arickx (2), J. Broeckhove (2) and V.N.Romanov   (1) ((1) Bogolyubov Institute for Theoretical Physics,...