Heavy-quark symmetries in the light of nonperturbative QCD approaches

2012/02/02 by El-Bennich, Bruno, Roberts, Craig D., Ivanov, Mikhail A.
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.1202.0454

Abstract

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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