Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Precision Determination of V_ub at an e+ e- B Factory   Current methods of determining V_ub are dominated by theoretical
uncertainties. We present Monte Carlo simulations of three promising methods of
determining V_ub with small theoretical and experimental errors. We find that
with data samples of order 1,000 fb-1 the B factories will attain combined
experimental errors of a few % on V_ub, much smaller than the theoretical
errors associated with new inclusive methods. Lattice QCD offers the promise of
rate calculations of exclusive semileptonic decays with errors of a few %. A
data sample of order 10,000 fb-1, beyond the capabilities of the current B
factories, may be required to achieve an experimental error on the exclusive
rate comparable to the theoretical error.

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The categories of this paper are: cond-mat
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The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
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The categories of this paper are: hep-th
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The categories of this paper are: econ
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
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The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org