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7 papers · 2 filters
Wick Rotation in the Light-Front
J. P. B. C. de Melo, E. Gambim, T. Frederico
We study the electroweak properties of pseudo-scalar mesons in the light and heavy-light sectors. In particular, we address the electromagnetic form factors and decay constants of…
Solution of the 5D Einstein equations in a dilaton background model
W. de Paula, T. Frederico, H. Forkel +1
We obtain an explicit solution of the 5d Einstein equations in a dilaton background model. We demonstrate that for each metric ansatz that only depends on the extra coordinate, it…
Dynamical holographic QCD with area-law confinement and linear Regge trajectories
W. de Paula, T. Frederico, H. Forkel +1
We construct a new solution of five-dimensional gravity coupled to a dilaton which encodes essential features of holographic QCD backgrounds dynamically. In particular, it implemen…
Light-front Ward-Takahashi Identity for Two-Fermion Systems
J. A. O. Marinho, T. Frederico, E. Pace +2
We propose a three-dimensional electromagnetic current operator within light-front dynamics that satisfies a light-front Ward-Takahashi identity for two-fermion systems. The light-…
Modeling electromagnetic form factors of light and heavy pseudoscalar mesons
B. El-Bennich, J. P. B. C. de Melo, B. Loiseau +2
The electromagnetic form factors of light and heavy pseudoscalar mesons are calculated within two covariant constituent-quark models, a light-front and a dispersion relation approa…
Time- and Spacelike Nucleon Electromagnetic Form Factors beyond Relativistic Constituent Quark Models
J. P. B. C. de Melo, T. Frederico, E. Pace +2
For the first time, a phenomenological analysis of the experimental electromagnetic form factors of the nucleon, both in the timelike and spacelike regions, is performed by taking…