In-Medium $K^+$ Electromagnetic Form Factor with a Symmetric Vertex in a Light Front Approach
Abstract
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) 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, , 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. 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.
Keywords
Cite
@article{arxiv.1712.07176,
title = {In-Medium $K^+$ Electromagnetic Form Factor with a Symmetric Vertex in a Light Front Approach},
author = {George H. S. Yabusaki and J. P. B. C. de Melo and Wayne de Paula and K. Tsushima and T. Frederico},
journal= {arXiv preprint arXiv:1712.07176},
year = {2018}
}
Comments
5 pages, 4 figures eps. Contribuition to the Light-Cone 2017, 18-22 September, 2017, Mumbai, India. Submitted to Few-Body (2017), small changes and final version published