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Semi-leptonic decays of heavy mesons and the Isgur-Wise function in quenched lattice QCD

UKQCD Collaboration·K. C. Bowler·G. Douglas·R. D. Kenway·G. N. Lacagnina·C. M. Maynard
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Abstract

The form factors for the semi-leptonic B->D and B->D* decays are evaluated in quenched lattice QCD at two different values of the coupling, beta=6.0 and 6.2. The action and the operators are fully O(a) non-perturbatively improved. The slope of the Isgur-Wise function is evaluated, and found to be rho^2=0.83^{+15+24}_{-11-1} (quoted errors are statistical and systematic respectively). Ratios of form factors are evaluated and compared to experimental determinations.

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UKQCD Collaboration, K. C. Bowler, G. Douglas, R. D. Kenway, G. N. Lacagnina, C. M. Maynard. 2002-02-28. Semi-leptonic decays of heavy mesons and the Isgur-Wise function in quenched lattice QCD. https://doi.org/10.1016/s0550-3213(02)00462-5

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