El-Bennich, Bruno [UNESP]Roberts, Craig D.Ivanov, Mikhail A.2014-05-272014-05-272011-12-01Proceedings of Science.1824-8039http://hdl.handle.net/11449/72821We 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: gDsDK = 24.1-1.6 +2.5 and gBsBK = 33.3 -3.7 +4.0. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.engDecay constantsEffective couplingFlavor symmetryForm factorsHeavy-quarkNonperturbativeCouplingsGreen's functionHigh energy physicsTrabalho apresentado em eventoAcesso aberto2-s2.0-848829500182-s2.0-84882950018.pdf