Symmetry Relations for Heavy-to-Light Meson Form Factors at Large Recoil [report]

R Hill
2004 unpublished
The description of large-recoil heavy-to-light meson form factors is reviewed in the framework of soft-collinear effective theory. At leading power in the heavy-quark expansion, three classes of approximate symmetry relations arise. The relations are compared to experimental data for D → K * and Ds → φ form factors, and to light-cone QCD sum rule predictions for B → π and B → ρ form factors. Implications for the extraction of |V ub | from semileptonic B → ρ decays are discussed.
doi:10.2172/839592 fatcat:k7uj5g6wpjfipo4twhak7hbfym