Unveiling the $K_1(1270)$ double-pole structure in the $\bar{B}\to J/\psi \rho \bar{K}$ and $\bar{B}\to J/\psi {\bar{K}}^{\ast }\pi$ decays

J. M. Dias, G. Toledo, L. Roca +1

By looking at the pseudoscalar-vector meson spectra in the $\bar{B}\to J/\psi \rho \bar{K}$ and $\bar{B}\to J/\psi {\bar{K}}^{\ast }\pi$ weak decays, we theoretically investigate the double-pole structu…