Mesons and Glueballs, the Strong Effective Coupling within Analytic Confinement
| Autor: | Gurjav Ganbold |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics Meson 010308 nuclear & particles physics Infrared fixed point Glueball High Energy Physics::Lattice High Energy Physics::Phenomenology Hadron Gluon condensate Coupling (probability) 01 natural sciences Mass formula Pseudoscalar 0103 physical sciences High Energy Physics::Experiment 010306 general physics |
| Zdroj: | Physics of Particles and Nuclei. 51:668-672 |
| ISSN: | 1531-8559 1063-7796 |
| DOI: | 10.1134/s1063779620040309 |
| Popis: | The phenomena of hadron mass generating, strong running coupling and radiative transitions of charmonium excited states have been studied in the framework of a relativistic field model with analytic confinement. A meson mass equation is derived and a specific new behavior of the mass-dependent strong coupling $$\mathop {\bar {\alpha }}\nolimits_s $$ is revealed in the time-like region. A new infrared fixed point $$\mathop {\bar {\alpha }}\nolimits_s (0) = 1.032$$ has been found at origin. Independent and new estimates on the scalar glueball mass, radius and gluon condensate value have been performed. The spectrum of conventional mesons have been calculated by introducing a minimal set of parameters with relative errors less than 1.8 percent compared to the latest data. Accurate estimates of the leptonic decay constants of pseudoscalar and vector mesons have also been performed. Partial decay widths of the dominant radiative transitions of the charmonium orbital excitations have been estimated with reasonable accuracy. |
| Databáze: | OpenAIRE |
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