Orateur
Description
We study the properties of the $K^{+}$-meson in nuclear medium within
the framework of light-front field theory, such as the electromagnetic form factors (EMFF), charge radius, decay constant and probability of the kaon valence component $\eta$, where the kaon ($K^{+}$-meson) structure in nuclear medium is described using the light-front $K^{+}$ meson wave function based on a Bethe-Salpeter amplitude model for the quark-anti-quark bound state. The $K^{+}$-meson model we adopt is well constrained by previous studies to explain its properties in vacuum. The in-medium $K^{+}$-meson properties is evaluated for the plus-component of the electromagnetic current, $J^+$, in the Breit frame with Drell-Yan conditions. In order to consistently incorporate the constituent up and anti-strange quarks of the $K^{+}$-meson in symmetric nuclear matter, we adopted the ``quark-meson coupling (QMC) model", which has been widely applied to various hadronic and nuclear phenomena in a symmetric nuclear medium. We predict the in-medium modification of the $K^{+}$-meson properties in symmetric nuclear matter. It is found that, after a fine tuning of the regulator mass, the model can describe the available experimental data in vacuum within the theoretical uncertainties, and based on this we predict the in-medium modification of the $K^{+}$-meson properties.
