Light-Cone 2023: Hadrons and Symmetries

Study of Kaon Structure with Light Front Approach in Nuclear Medium

Non programmé

20m

Rio de Janeiro, Brazil

Seminar Plenary

Orateur

George Yabusaki (Adjunct Professor II)

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.