Study of reactions disclosing hidden charm pentaquarks with or without strangeness

We present results for five reactions, Λ_b→J/ψK⁻p, Λ_b→J/ψηΛ, Λ_b→J/ψπ⁻p, Λ_b→J/ψK⁰Λ and Ξ_b⁻→J/ψK⁻Λ, where combining information from the meson baryon interaction, using the chiral unitary approach, and predictions made for molecular states of hidden charm, with or without strangeness, we can evaluate invariant mass distributions for the light meson baryon states, and for those of J/ψp or J/ψΛ. We show that with the present available information, in all of these reactions one finds peaks where the pentaquark states show up. In the Λ_b→J/ψK⁻p and Λ_b→J/ψπ⁻p reactions we show that the results obtained from our study are compatible with present experimental observations.