Pentaquarks in semileptonic ${\Lambda }_b$ decays

Ping Zhou, Y. K. Hsiao, C. Q. Geng

In terms of ${\mathcal{P}}_{c1,c2}={\mathcal{P}}_c(4380,4450{)}^{+}$ as the hidden charm pentaquark states to consist of $c\bar{c}uud$, we study the semileptonic $Λ_b\to ({\cal P}_{c1,c2}\to)J/ψ…