The B R Underscore Arrow D L Nu Form Factor At Zero Recoil

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The B R Underscore Arrow D L Nu Form Factor At Zero Recoil

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Author :
language : en
Publisher:
Release Date : 2000

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The authors describe a model independent lattice QCD method for determining the deviation from unity for h{sub A{sub 1}}, the B {r{underscore}arrow} D*l[nu] form factor at zero recoil. They extend the double ratio method previously used to determine the B {r{underscore}arrow} Dl[nu] form factor. The bulk of statistical and systematic errors cancel in the double ratios they consider, yielding form factors which promise to reduce present theoretical uncertainties in the determination of {vert{underscore}bar}V{sub cb}{vert{underscore}bar}. They present results from a prototype calculation at a single lattice spacing corresponding to [beta] = 5.7.