Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 10, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP10(2012)169
Keywords
B-Physics; Heavy Quark Physics; QCD; Quark Masses and SM Parameters
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Funding
- Italian Ministry of Research (MIUR) [2008H8F9RA_002]
- German research foundation DFG [MA1187/10-1]
- German Ministry of Research (BMBF) [05H09PSF]
- NSF [PHY-0807959]
- [RSGSS 4801.2012.2]
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We present a QCD analysis of heavy quark mesons focussing on the B -> D* formfactor at zero recoil, F-D* (1). An advanced treatment of the perturbative corrections in the Wilsonian approach is presented. We estimate the higher-order power corrections to the OPE sum rule and describe a refined analysis of the nonresonant continuum contribution. In the framework of a model-independent approach, we show that the inelastic contribution in the phenomenological part of the OPE is related to the m(Q)-dependence of the hyperfine splitting and conclude that the former is large, lowering the prediction for F-D* (1) down to about 0.86. This likewise implies an enhanced yield of radial and D-wave charm excitations in semileptonic B decays and alleviates the problem with the inclusive yield of the wide excited states. We also apply the approach to the expectation values of dimension 7 and 8 local operators and to a few other issues in the heavy quark expansion.
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