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The form factors of Bc meson decaying to charmonium c and J/ are analyzed in the framework of three-point QCD sum rules. In these analyses, the contributions of the vacuum condensate terms gₒ^2G^2 and f^3G^3 are considered. In addition, the decay widths and branch ratios of several decay channels are obtained by using the calculated form factors. These decay processes include the nonleptonic decay processes of Bc^- c ^-, c K^-, c ^-, c K^*-, Bc^- J/ ^-, J/ K^-, J/ ^-, J/ K^*-, and the semileptonic decay channels of Bc^- c l, Bc^- J/ l. These results about the form factors and decay properties of Bc meson provide useful information to us to study the heavy-quark dynamics and find new physics (NP) beyond Standard Model (SM).
Yu et al. (Wed,) studied this question.