Heavy Hadron Form Factor Relations for m_cneinfty and bas(m_c)ne0
classification
✦ hep-ph
keywords
formlambdarelationsfactorheavyorderordersbaryon
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First order power corrections to current matrix elements between heavy meson or $\Lambda_\Q$ baryon states are shown to vanish at the zero recoil point to all orders in QCD. Five relations among the six form factors that parametrize the semileptonic decay $\Lambda_b \to \Lambda_c e \overline{\nu}$ are also demonstrated to exist to all orders in the strong coupling at order $1/\mQ$ . The $O(\bas(m_c)/m_c)$ form factor relations are displayed.
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