Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Model-Independent Determinations of B -> D l nu , D* l nu Form Factors   We present nonperturbative, model-independent parametrizations of the
individual QCD form factors relevant to B -> D* l nu and B -> D l nu decays.
These results follow from dispersion relations and analyticity, without
recourse to heavy quark symmetry. To describe a form factor with two percent
accuracy, three parameters are necessary, one of which is its normalization at
zero recoil, F(1). We combine the individual form factors using heavy quark
symmetry to extract values for the product |V_{cb}| F(1) from B -> D* l nu data
with negligible extrapolation uncertainty.

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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
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The categories of this paper are: math
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The categories of this paper are: cond-mat
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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: cs
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The categories of this paper are: supr-con
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The categories of this paper are: hep-lat
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The categories of this paper are: comp-gas