LPN14-004 Leptonic decay of the Upsilon(1S) meson at third-order in QCD

LPN14-004 Leptonic decay of the Upsilon(1S) meson at third-order in QCD
M. Beneke, Y. Kiyo, P. Marquard, A. Penin, J. Piclum, D. Seidel, M. Steinhauser
Phys.Rev.Lett. 112 151801 2014
arXiv