Abstract: The existence of pentaquarks with strangeness content zero (S=0) and one (S=-1) are major discoveries of the latest years in hadron physics. Most of these states can be understood as hadronic molecules and were predicted prior to their discovery within a model based on unitarized meson-baryon amplitudes obtained from vector-meson exchange interactions. Contrary to earlier statements, we show this model to also predict the existence of pentaquarks with double strangeness (S=-2), at about 4500 and 4600 MeV, which are generated in a very specific and unique mechanism, via an attraction induced by a strong coupling between the two heaviest meson-baryon states. 

References: J. A. Marsé-Valera, V. K. Magas, and A. Ramos, Phys. Rev. Lett. 130, 091903 (2023)