%0 Journal Article
%T Heavy-quark symmetries in the light of nonperturbative QCD approaches
%A Bruno El-Bennich
%A Craig D. Roberts
%A Mikhail A. Ivanov
%J Physics
%D 2012
%I arXiv
%X We critically review the validity of heavy-quark spin and flavor symmetries in heavy-light decay constants, form factors and effective couplings obtained within a nonperturbative framework, the ingredients of which are all motivated by Dyson-Schwinger equations studies of QCD. Along the way, we make new predictions for two effective nonphysical couplings: g_{DsDK} = 24.1+2.5/-1.6 and g_{BsBK} = 33.3+4.0/-3.7.
%U http://arxiv.org/abs/1202.0454v1