E. Ferreira
Federal University of Rio de Janeiro
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Publication
Featured researches published by E. Ferreira.
Physical Review D | 1999
R. S. Marques de Carvalho; E. Ferreira; M. Nielsen; Hans Gunter Dosch; Fernando Silveira Navarra
QCD sum rules for the determination of form factors of
Physical Review D | 2002
H. G. Dosch; E. Ferreira; Fernando Silveira Navarra; M. Nielsen
{ensuremath{Lambda}}_{b}
European Physical Journal C | 2003
Hans Gunter Dosch; E. Ferreira
and
European Physical Journal C | 2007
Hans Gunter Dosch; E. Ferreira
{ensuremath{Lambda}}_{c}
Physics Letters B | 2003
Hans Gunter Dosch; E. Ferreira
semileptonic decays are investigated. With a form for the baryonic current appropriate for the limits of the heavy quark symmetries, the different tensor structures occurring in the two- and three-point functions are separately studied, and in each case general relations are written for the form factors. Particular attention is given to the treatment of the kinematical region ascribed to the continuum. The t dependence of the form factors and the decay rates are numerically evaluated and compared to experimental information.
Physical Review D | 2013
A. K. Kohara; E. Ferreira; T. Kodama
Semileptonic decays of D mesons into scalar hadronic states are investigated. Two extreme cases are considered: (a) the meson decays directly into an uncorrelated scalar state of two mesons and (b) the decay proceeds via resonance formation. QCD sum rules including instanton contributions are used to calculate total and differential decay rates under the two assumptions.
Nuclear Physics B - Proceedings Supplements | 2003
M. Nielsen; Fernando Silveira Navarra; Hans Gunter Dosch; E. Ferreira
Abstract. We present a nonperturbative QCD calculation of elastic
AIP Conference Proceedings | 2010
A. K. Kohara; E. Ferreira; T. Kodama
J/psi
Journal of Physics G: Nuclear Physics | 1987
E. Ferreira; S C B Andrade; Hans Gunter Dosch
meson production in photon-proton scattering at high energies. Using light cone wave functions of the photon and vector mesons, and the framework of the model of the stochastic QCD vacuum, we calculate the differential and integrated elastic cross sections for
European Physical Journal C | 2017
A. K. Kohara; E. Ferreira; T. Kodama; M. S. Rangel
gamma p rightarrow J/psi p