18-23 March 2018
Florianopolis, Brazil
America/Sao_Paulo timezone

Study In-Medium K^+ with a Symmetric Vertex in a Light Front Approach

19 Mar 2018, 16:00
Florianopolis, Brazil

Florianopolis, Brazil


George Yabusaki (ITA - Technological Institute of Aeronautics)


Using the light-front kaon wave function based on a Bethe-Salpeter amplitude model for the quark-antiquark bound state, we study the Electromagnetic Form Factor (EMFF) and other observables like charge radius and decay constant of the kaon in nuclear medium within the framework of light-front field theory. The kaon model we adopt is well constrained by previous and recent studies to explain its properties in vacuum. The in-medium kaon EMFF is evaluated for the + component of the electromagnetic current, J+, in the Breit frame. In order to consistently incorporate the constituent up and antistrange quarks of the kaon immersed in symmetric nuclear matter, we use the Quark-Meson Coupling (QMC) 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 kaon 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 vaccum within the theoretical uncertainties, and based on this we predict the in-medium modification of the EMFF, charge radius and decay constant.

Primary author

George Yabusaki (ITA - Technological Institute of Aeronautics)


Wayne de Paula (Instituto Tecnologico de Aeronautica) João Pacheco De Melo (Universidade Cruzeiro do Sul) Kazuo Tsushima (CSSM, Adelaide University) Tobias Frederico (Instituto Tecnologico de Aeronautica)

Presentation materials