Theoretical description of the decays ${\Lambda }_b\to {\Lambda }^{(\ast )}({\frac{1}{2}}^{\pm },{\frac{3}{2}}^{\pm })+J/\psi$

Thomas Gutsche, Mikhail A. Ivanov, Jürgen G. Körner +3

We calculate the invariant and helicity amplitudes for the transitions ${\Lambda }_b\to {\Lambda }^{(\ast )}(J^P)+J/\psi$ where the ${\Lambda }^{(\ast )}(J^P)$ are $\Lambda (sud)$-type ground and excited states with…