Rare decays of B-> J/ψD^(*) and B->η_c D^(*)in pQCD Approach

Abstract

Motivated by the recent measurement of the upper limit of $B^0\to J/\psi D$ branching ratio, which is important in accounting for the soft $J/\psi$ production in B decays, we investigate $B^0\to J/\psi D^{(\star )}$ and ${\eta }_c{D}^{(\star )}$ decays in perturbative QCD approach based on $k_T$ factorization. Being pure annihilation (W-exchange) decays, these branching ratios are estimated to be at the order of $10^{-5}\sim 10^{-7}$, which are just at the corner of being observable at the $B$ factories. The measurements of these decay channels may help us to understand the QCD dynamics in the corresponding energy scale, especially the reliability of pQCD approach to these processes.

arXiv comment10 pages, 1 figure

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Cited by in corpus (13)

• Semileptonic decays $B_c\to ({\eta }_c,J/\Psi )l\nu$ in the perturbative QCD approach
• S-wave ground state charmonium decays of $B_c$ mesons in the perturbative QCD approach
• Semileptonic decays $B_c\to ({\eta }_c,J/\psi )l{\bar{\nu }}_l$ in the "PQCD + Lattice" approach
• The two-body B_c {\to} D^{(*)}_{(s)}P, D^{(*)}_{(s)}V decays in the Perturbative QCD Approach
• Contribution of final state interaction to the branching ratio of $B\to J/\psi D$
• The double charm decays of $B_c$ Meson in the Perturbative QCD Approach
• Identifying Glueball at 3.02 GeV in Baryonic $B$ Decays
• Study of $B_c\to DS$ Decays in PQCD Approach
• Study of $B_s$ $\to$ ${\eta }_c(J/\psi )D$ decay with perturbative QCD approach
• Weak Radiative B Decays
• Analysis of B to J a1(1260)in pertubative QCD approach
• Study of $B_c\to J/\psi (a_1(1260)$, $b_1(1235)$, $a_2(1320)$, $K_2^{\ast }(1430))$ decay with a perturbative QCD approach
• Insights into the nature of the $X(3872)$ through B meson decays