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Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/22980

Title: The B --> D*lv Form factor at zero recoil
Author: RYAN, SINEAD MARIE
Author's Homepage: http://people.tcd.ie/ryansin
Keywords: Pure & Applied Mathematics
Issue Date: 2000
Publisher: Elsevier
Citation: Simone, J. N., Hashimoto, S., El-Khadra, A. X., Kronfeld, A. S., Mackenzie, P. B., Ryan, S. M. ‘The B --> D*lv Form factor at zero recoil’ in Nuclear Physics B - Proceedings Supplements, 83-84, 2000, pp 334-336
Series/Report no.: Nuclear Physics B - Proceedings Supplements
83-84
Abstract: A lattice QCD calculation of the ¯B → Dl¯ decay form factors is presented. We obtain the value of the form factor h+(w) at the zero-recoil limit w = 1 with high precision by considering a ratio of correlation functions in which the bulk of the uncertainties cancels. The other form factor h−(w) is calculated, for small recoil momenta, from a similar ratio. In both cases, the heavy quark mass dependence is observed through direct calculations with several combinations of initial and final heavy quark masses. Our results are h+(1) = 1.007(6)(2)(3) and h−(1) = −0.107(28)(04)(10 30). For both the first error is statistical, the second stems from the uncertainty in adjusting the heavy quark masses, and the last from omitted radiative corrections. Combining these results, we obtain a precise determination of the physical combination FB→D(1) = 1.058(20 17), where the mentioned systematic errors are added in quadrature. The dependence on lattice spacing and the effect of quenching are not yet included, but with our method they should be a fraction of FB→D − 1.
Description: PUBLISHED
URI: http://dx.doi.org/10.1016/S0920-5632(00)91665-7
http://hdl.handle.net/2262/22980
ISSN: 35115
Appears in Collections:Pure & Applied Mathematics (Scholarly Publications)

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