Published

2002-01-01

Lagrangiano para QCD a bajas energías

Keywords:

Cromo dinámica cuántica, teorías efectivas, sistemas hadrónicos, Lagrangiano Efectivo, QCD, teorías de calibración (es)

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Authors

  • John Morales Centro Internacional de Física
  • Germán Sinuco Universidad Nacional de Colombia

Al comparar las constantes de acoplamiento asociadas a la Electrodinámica Cuántica y a la Cromodinámica Cuántica, se observa la imposibilidad de utilizar métodos perturbativos para la descripción de la interacción fuerte a bajas energías. Esto justifica la búsqueda de otros planteamientos que permitan calcular propiedades de los sistemas hadrónicoso En este trabajo se presenta la construcción del Lagrangiano. Efectivo de interacción de menor orden, útil para la descripción de procesos mesón-7T - Nucleón para energías < 1,0 GeV.

Comparing the behavior of the coupling constants for the Quantum Electrodynamics and the Quantum Chromodynamies we observe the impossibility to use perturbative methods to describe the strong interaction at low energies. This give us a good reason for explore other procedures in order to calculate properties of hadronic systerns. In this work we present how construct an effective interaction lagrangian of srnaller order, useful to describe processes mesons-Nucleon with energy less than  l,O GeV.

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