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