Precision Determination of V_ub at an e+ e- B Factory

Details Precision Determination of V_ub at an e+ e- B Factory Precision Determination of V_ub at an e+ e- B Factory

2002-03-11

arxiv.org/abs/hep-ex/0203015v1

eConf C010630 (2001) E203

Physics

High Energy Physics

High Energy Physics - Experiment

3 pages, 1 figure

Scientific paper

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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