Estudio de la espectroscopía de bariones-mesones utilizando un modelo de quarks constituyentes : Modelo 3P0 para cálculo del ancho de desintegración de bariones.

Abstract

This work examines the strong decay process of a baryon into a meson-baryon system using its decay width. Through the 3P0 pair creation model, the transition matrix of the process is calculated to assess its probability of occurrence. Simplifications are applied to the calculation via Feynman diagram equivalences and the selection of an appropriate coordinate system (rho, lambda), maintaining generality within the light quark spectrum. Different angular couplings are calculated using Wigner symbols, determining which decays are allowed. Finally, leveraging the independence of quantum numbers, the transition matrix is decomposed into three contributions: color, flavor, and spin-space. The outcome is an analytical expression for the decay width of the process, which can be calculated given the initial and final particles.