In-Medium K+ Electromagnetic Form Factor with a Symmetric Vertex in a Light Front Approach

Author(s)

Yabusaki, George H. S. ^{[1, 2]} ; de Melo, J. P. B. C. ^[2] ; de Paula, Wayne ^[1] ; Tsushima, K. ^[2] ; Frederico, T. ^[1]

Affiliation

^[1] Inst Tecnol Aeronaut ITA, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP - Brazil

^[2] UCS, Lab Fis Teor & Computac, Rua Galvao Bueno, 868 Bloco B Sala 107, BR-01506000 Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: FEW-BODY SYSTEMS; v. 59, n. 3 MAY 2018.
• Web of Science Citations: 1

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. m(R) = 0.600GeV, 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. (AU)

• FAPESP's process: 15/16295-5 - Phenomenology of the particle physics and nucleus in the light-front formalism
• Grantee: Joao Pacheco Bicudo Cabral de Mello
• Support type: Regular Research Grants
• FAPESP's process: 15/17234-0 - Properties of hadrons and nuclei in vacuum and medium based on quarks and gluons
• Grantee: Kazuo Tsushima
• Support type: Regular Research Grants
• FAPESP's process: 17/05660-0 - Theoretical studies of the structure and reactions of exotic nuclei and many-body systems
• Grantee: Brett Vern Carlson
• Support type: Research Projects - Thematic Grants