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A Low Energy Effective Quark-gluon Vertex To Calculate The Pseudoscalar Meson Spectrum

Rojas, Eduardo Y El-Bennich, Bruno Y Zambrano, G.E.R (2021) A Low Energy Effective Quark-gluon Vertex To Calculate The Pseudoscalar Meson Spectrum. In: 6th ComHEP: Colombian Meeting on High Energy Physics, 29 nov. - 3 dic. 2021, Santa Marta, Colombia.

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Based on the generalized quantum electrodynamics expression for the Podolsky propagator, which preserves gauge invariance for massive photons, we propose a model for the massive gluon propagator that reproduces well-known features of established strong-interaction models in the framework of the Dyson-Schwinger equation. By adjusting the Podolsky mass and the coupling strength we thus construct a model with simple analytical properties known from perturbative theory, yet well suited to describe a confining interaction. We obtain solutions of the Dyson-Schwinger equation for the quark at spacelike momenta on the real axis as well as on the complex plane and solving the bound-state problem with the Bethe-Salpeter equation yields masses and weak decay constants of the π, K and ηc in excellent agreement with experimental values, while the D and Ds are reasonably well described. The analytical simplicity of this effective interaction has the potential to be useful for phenomenological applications and may facilitate calculations in Minkowski space.

Tipo de Elemento: Conferencia o Taller artículo (Poster)
Asunto: Q Ciencias > QC Physics
Division: Facultad de Ciencias Exactas y Naturales > Programa de Física > Eventos
Depósito de Usuario: Prof. Eduardo Rojas
Fecha Deposito: 22 Aug 2022 20:12
Ultima Modificación: 22 Aug 2022 20:13

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