Semileptonic $B_c$ Decay and Heavy Quark Spin Symmetry

Details Semileptonic $B_c$ Decay and Heavy Quark Spin Symmetry Semileptonic $B_c$ Decay and Heavy Quark Spin Symmetry

1992-04-30

arxiv.org/abs/hep-ph/9204238v1

Nucl.Phys.B390:463-473,1993

Physics

High Energy Physics

High Energy Physics - Phenomenology

(12 Pages, no figures)

Scientific paper

10.1016/0550-3213(93)90464-Z

Semileptonic decay of the $B_c$ meson is studied in the heavy quark limit. The six possible form factors for $B_c \rightarrow B_s (B^0),B_s^* (B^{*0})$ semileptonic decay are determined by two invariant functions. Only one of these functions contributes at zero recoil, where it is calculable to lowest order in an operator product expansion in terms of the meson decay constant $f_B$ and the $B_c$ wavefunction. A similar result is found for $B_c \rightarrow D^0,D^{*0}$ and for $B_c\rightarrow\eta_c,J/\psi$ semileptonic decay for a restricted kinematic region. Semileptonic $B_c$ decay provides a means for determining the KM mixing angle $|V_{ub}|$.

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