Using heavy quark spin symmetry in semileptonicBcdecays

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Abstract

The form factors parametrizing the ${B}_{c}$ semileptonic matrix elements can be related to a few invariant functions if the decoupling of the spin of the heavy quarks in ${B}_{c}$ and in the mesons produced in the semileptonic decays is exploited. We compute the form factors as an overlap integral of the meson wave functions obtained using a QCD relativistic potential model, and give predictions for semileptonic and nonleptonic ${B}_{c}$ decay modes. We also discuss possible experimental tests of the heavy quark spin symmetry in ${B}_{c}$ decays.

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