29 de agosto de 2018 | Altas Energias, Publicações
G. H. S. Yabusaki, J. P. B. C. de Melo, W. de Paula, K. Tsushima, T. Frederico
Few-Body Systems. Vol. 59, p. 37, 2018
16/03/2018
Abstract
Using the light-front K+ -Meson wave function based on a Bethe-Salpeter amplitude model for the Quark-Antiquark bound state, we study the Electromagnetic Form Factor (EMFF) of the K+ -Meson in nuclear medium within the framework of light-front field theory. The K+ -Meson model we adopt is well constrained by previous and recent studies to explain its properties in vacuum. The in-medium K+ -Meson EMFF is evaluated for the plus-component of the electromagnetic current, J+ , in the Breit frame. In order to consistently incorporate the constituent up and antistrange Quarks of the K+ -Meson immersed in symmetric nuclear matter, we use the Quark-Meson coupling model, which has been widely applied to various hadronic and nuclear phenomena in a nuclear medium with success. We predict the in-medium modification of the K+ -Meson EMFF in symmetric nuclear matter. It is found that, after a fine tuning of the regulator mass, i.e. mR=0.600 GeV, the model is suitable to fit the available experimental data in vacuum within the theoretical uncertainties, and based on this we predict the in-medium modification of the K+ -Meson EMFF.