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- W2118827528 abstract "In view of new precise measurements of the B → D∗ℓν decay rate near zero recoil, we reconsider the theoretical uncertainties in the extraction of |Vcb| using heavy quark symmetry. In particular, we combine our previous estimate of 1/mQ2 corrections to the normalization of the hadronic form factor at zero recoil with sum rules derived by Shifman et al. to obtain a new prediction with less theoretical uncertainty. We also summarize the status of the calculation of short-distance corrections, and of the slope of the form factor at zero recoil. We find (1) = ηAξ(1) = 0.93 ± 0.03 andρ2=0.7 ± 0.2. Combining this with the most recent experimental results, we obtain the model-independent value |Vcb| = 0.040 ± 0.003." @default.
- W2118827528 created "2016-06-24" @default.
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- W2118827528 date "1994-10-01" @default.
- W2118827528 modified "2023-09-24" @default.
- W2118827528 title "Theoretical update on the model-independent determination of |Vcb| using heavy quark symmetry" @default.
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- W2118827528 doi "https://doi.org/10.1016/0370-2693(94)91348-x" @default.
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