Effect of thresholds on the width of three-body resonances.

It has been recently reported an intriguing theoretical result of a narrow three-body resonance with a large available phase space [1] . The resonance was reported in the N Λ Λ − Ξ N N system near the Ξ d threshold, having a very small width in spite of the open N ΛΛ channel lying around 23 MeV below the Ξ NN channel. We use first-order perturbation theory as a plausible argument to explain this behavior. We apply our result to realistic local interactions. Other systems involving several thresholds are likely to follow the same behavior. [ABSTRACT FROM AUTHOR]