Bounds on Heavy-to-Heavy Baryonic Form Factors
arXiv:hep-ph/9907557 · doi:10.1103/PhysRevD.61.016005
Abstract
Upper and lower bounds are established on the Lambda_b -> Lambda_c semileptonic decay form factors by utilizing inclusive heavy-quark-effective-theory sum rules. These bounds are calculated to leading order in Lambda_QCD/m_Q and alpha_s. The O(alpha_s^2 beta_0) corrections to the bounds at zero recoil are also presented. Several form factor models used in the literature are compared with our bounds.
20 pages, 9 figures
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