机译:Study of the New documentclass12pt{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$${text{B}}_{{text{c}}}^{ + }$$end{document} Meson Decays with Charmonium and Three Light Hadrons in the LHCB Experiment