Temperature dependence of $\rho$ meson-nucleon coupling constant from the AdS/QCD soft-wall model.

Nasibova N.
  Giovedì 15/09   09:00 - 13:00   Aula B - Maria Goeppert-Mayer   I - Fisica nucleare e subnucleare   Presentazione
We investigate the dependence of the $\rho$ meson-nucleon coupling constant on the temperature of the medium using the soft-wall model of AdS/QCD. The finite temperature profile functions for the vector and fermion fields are applied to the model having a thermal dilaton field. The interaction Lagrangian in the bulk between these fields is written as in the zero-temperature case and includes minimal- and magnetic-type interactions. The temperature dependence of the $g\rho N N(T)$ coupling constant and its terms are plotted. We observe that the coupling constant and its separate terms become zero at the medium temperature near the Hawking temperature of phase transition.