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Pentaquark Decay in QCD Sum Rules
F. S. Navarra, M. Nielsen, R. Rodrigues da Silva
In a diquark-diquark-antiquark picture of the pentaquark we study the decay within the framework of QCD sum rules. After evaluation of the relevant three-point funct…
Can the meson cloud explain the nucleon strangeness?
Fabiana Carvalho, Fernando S. Navarra, Marina Nielsen
We use the meson cloud model, including the kaon and the contributions, to estimate the electric and magnetic strange form factors of the nucleon. We compare our results with…
Hadronic form factors and the secondary production cross section: an update
F. Carvalho, F. O. Durães, F. S. Navarra +1
Improving previous calculations, we compute the cross section using the most complete effective lagrangians available. The new crucial ingredients are the…
Disentangling two- and four-quark state pictures of the charmed scalar mesons
M. E. Bracco, A. Lozea, R. D. Matheus +2
We suggest that the recently observed charmed scalar mesons (BELLE) and (FOCUS) are considered as different resonances. Using the QCD sum rule app…