Speaker
Eulogio Oset
(IFIC, Univversity of Valencia)
Description
We study the Λ_b → J/ψ K0 Λ reaction considering both the K0 Λ interaction with its coupled channels and the J/ψΛ interaction. The latter is described by taking into account the fact that there are predictions for a hidden-charm state with strangeness that couples to J/ψΛ. By using the coupling of the resonance to J/ψΛ from these predictions we show that a neat peak can be observed in the J/ψΛ invariant mass distribution, rather stable under changes of unknown magnitudes. In some cases, one finds a dip structure associated to that state, but a signal of the state shows up in the J/ψ spectrum. The same is done by studying the related Λ_b → J/ψηΛ rreaction, by combining the ηΛ and J/ψ Λ interactions.
