Contributions of ${\psi }_2(3823)$ and $\psi (4040)$ charmonium in $B^{+}\to J/\psi \eta K^{+}$ decay

Elnaz Amirkhanlou, Behnam Mohammadi

Recently, a study on the $J/\psi \eta$ mass spectrum from $B^{+}\to J/\psi \eta K^{+}$ decays was reported by the LHCb detector. The results of this study are reported as a ratio of branching…