Publicação: SU(4)-flavor symmetry breaking in hadron couplings
Carregando...
Data
Autores
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Tipo
Trabalho apresentado em evento
Direito de acesso
Resumo
We present results of two studies examining the accuracy of SU(4)-flavor symmetry relations between hadron couplings. Initially, we discuss results obtained with a 3P0 quark-pair creation model with hadron wave functions obtained from a nonrelativistic quark model. Next, we contrast the 3P0 results with those obtained in a framework in which all elements are constrained by studies of Dyson-Schwinger and Bethe-Salpeter equations in QCD. We focus on the three-meson couplings ρπ π, ρKK, and ρDD and meson-baryon couplings π NN, KΛN and DΛcN. Within the 3P0 model, we find that the SU(4) breaking is at most 30% in the charm sector, f or the three-meson and meson-baryon couplings. Within the relativistic Dyson-Schwinger-Bethe-Salpeter framework, the breaking is large in the charm sector, of the order of 300% for the three-meson couplings, but the predicted form factors are much softer than those usually used in meson-exchange models. Consequences of these findings for the predictions of DN cross-sections and of exotic nuclear bound states of J/ψ or heavy-light D and D* mesons are discussed. © Copyright owned by the author(s).
Descrição
Palavras-chave
Idioma
Inglês
Como citar
Proceedings of Science.
