TTP09-41 Matching QCD and HQET heavy--light currents at three loops

TTP09-41 Matching QCD and HQET heavy–light currents at three loops

TTP09-41 Matching QCD and HQET heavy–light currents at three loops

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.

S. Bekavac, A.G. Grozin, P. Marquard, J.H. Piclum, D. Seidel, M. Steinhauser
Nucl.Phys.B833:46-63 B833 46-63 2010
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