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• W2016543286 abstract "We use heavy quark effective theory (HQET) and perturbative QCD to study the heavy-meson--light-vector-meson transitions involved in D and B decays. HQET is used to relate the measured Densuremath{rightarrow}${mathit{K}}^{mathrm{*}}$lensuremath{nu} vector and axial-vector form factors at four-momentum transfer ${mathit{q}}^{2}$=0 to the Bensuremath{rightarrow}${mathit{K}}^{mathrm{*}}$ensuremath{gamma} tensor and axial-tensor form factors at ${mathit{q}}^{2}$=16.5 ${mathrm{GeV}}^{2}$. Perturbative QCD is then used to find matching conditions for the B-meson form factors at ${mathit{q}}^{2}$=0. A five parameter ``vector-dominance''-type fit of the two HQET form factors, consisting of single pole, double pole, and subtraction terms, is used to match the data at ${mathit{q}}^{2}$=16.5 ${mathrm{GeV}}^{2}$ to QCD at ${mathit{q}}^{2}$=0. The values at ${mathit{q}}^{2}$=0 are compared with recent data on the exclusive rate for Bensuremath{rightarrow}${mathit{K}}^{mathrm{*}}$ensuremath{gamma} decay to extract a value for the Cabibbo-Kobayashi-Maskawa matrix element ensuremath{Vert}${mathit{V}}_{mathit{t}mathit{s}}$ensuremath{Vert}=0.026, with 23% experimental uncertainty, and 29% theoretical uncertainty from higher order QCD effects and violations of heavy quark symmetry." @default.
• W2016543286 created "2016-06-24" @default.
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• W2016543286 date "1994-11-01" @default.
• W2016543286 modified "2023-09-27" @default.
• W2016543286 title "Determination of ‖Vts‖ fromD→K*lν andB→K*γ data via heavy quark symmetry and perturbative QCD" @default.
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• W2016543286 doi "https://doi.org/10.1103/physrevd.50.5751" @default.
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