Heavy-quark symmetries in the light of nonperturbative QCD approaches

Details Heavy-quark symmetries in the light of nonperturbative QCD approaches Heavy-quark symmetries in the light of nonperturbative QCD approaches

2012-02-02

arxiv.org/abs/1202.0454v1

Physics

Nuclear Physics

Nuclear Theory

Contributed to the proceedings of "International Workshop on QCD Green's Functions, Confinement and Phenomenology", September

Scientific paper

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.

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