Abstract
In this paper, we study rare decays \( {B_c}\to D_{s,d}^{{\left( * \right)}}l\overline{l} \) within the Standard Model. The penguin, box, annihilation, color-favored cascade and color-suppressed cascade contributions are included. Based on our calculation, the annihilation and color-favored cascade diagrams play important roles in the differential branching fractions, forward-backward asymmetries, longitudinal polarizations of the final vector mesons and leptonic longitudinal polarization asymmetries. More importantly, color-favored cascade decays largely enhance the resonance cascade contributions. To avoid the resonance cascade contribution pollution, new cutting regions are put forward.
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Ju, WL., Wang, GL., Fu, HF. et al. The study of rare \( {B_c}\to D_{s,d}^{{\left( * \right)}}l\overline{l} \) decays. J. High Energ. Phys. 2014, 65 (2014). https://doi.org/10.1007/JHEP04(2014)065
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DOI: https://doi.org/10.1007/JHEP04(2014)065