arXiv:0911.3356·v3·High Energy Physics — Phenomenology
Matching QCD and HQET heavy-light currents at three loops
S. Bekavac🇩🇪 · A.G. Grozin🇩🇪 · P. Marquard🇩🇪 · J.H. Piclum🇨🇦 · D. Seidel🇨🇦 · M. Steinhauser🇩🇪
Abstract
We consider the currents formed by a heavy and a light quark within Quantum Chromodynamics and compute the matching to Heavy Quark Effective Theory to three-loop accuracy. As an application we obtain the third-order perturbative corrections to ratios of B-meson decay constants.
Comments: 23 pages, full results are available as Mathematica files at http://www-ttp.particle.uni-karlsruhe.de/Progdata/ttp09/ttp09-41/ ; v2: an error in comparison with Ref. [8] fixed ; v3: Journal version