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Dive into the research topics where E. Ferreira is active.

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Featured researches published by E. Ferreira.


Physical Review D | 1999

Form-factors and decay rates for heavy Lambda semileptonic decays from QCD sum rules

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

Semileptonic D decay into scalar mesons: A QCD sum rule approach

H. G. Dosch; E. Ferreira; Fernando Silveira Navarra; M. Nielsen

{ensuremath{Lambda}}_{b}


European Physical Journal C | 2003

Nonperturbative QCD treatment of \(J/\Psi\) photoproduction

Hans Gunter Dosch; E. Ferreira

and


European Physical Journal C | 2007

Nonperturbative and perturbative aspects of photo- and electroproduction of vector mesons

Hans Gunter Dosch; E. Ferreira

{ensuremath{Lambda}}_{c}


Physics Letters B | 2003

Exclusive electroproduction of J/ψ mesons

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

Elasticpp¯scattering amplitude at 1.8 TeV and determination of total cross section

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

Semileptonic D decay into scalar mesons

M. Nielsen; Fernando Silveira Navarra; Hans Gunter Dosch; E. Ferreira

Abstract. We present a nonperturbative QCD calculation of elastic


AIP Conference Proceedings | 2010

Analysis of pp and pp̄ in forward scattering using derivative dispersion relations

A. K. Kohara; E. Ferreira; T. Kodama

J/psi


Journal of Physics G: Nuclear Physics | 1987

The short-range delta-nucleon interaction

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

Elastic amplitudes studied with the LHC measurements at 7 and 8 TeV

A. K. Kohara; E. Ferreira; T. Kodama; M. S. Rangel

gamma p rightarrow J/psi p

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T. Kodama

Federal University of Rio de Janeiro

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A. K. Kohara

Federal Fluminense University

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M. Nielsen

University of São Paulo

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M. S. Rangel

Federal University of Rio de Janeiro

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