J Psi Dd Vertex
Mostrando 1-2 de 2 artigos, teses e dissertações.
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1. The coupling constants in QCD sum rules / "Constantes de acoplamento a partir das regras de soma da QCD"
We use the QCD sum rules to obtain the masses of the pentaquarks _+(1540) and _−−(1862), _+ decay width and the coupling constant and the form factor for the J/ DD* vertex.In the study of the pentaquarks, we use two kinds of interpolating fields, containing two highly correlated diquarks. We get the masses in a good agreement with the experimenta
Publicado em: 2005
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2. The J/psiDD* vertex
We employ QCD sum rules to calculate the J/psiDD* form factors and coupling constant by studying the threepoint J/psiD*D correlation function. We find that the momentum dependence of the form factor depends on the off-shell meson. We get a value for the coupling which is in agreement with estimates based on constituent quark model.
Brazilian Journal of Physics. Publicado em: 2004-03