KN Lambda and KN Sigma coupling constants from the Chiral Bag Model

The KNA and KN Sigma coupling constants have been calculated in the framewo rk of the Chiral Bag Model(CBM). We find -3.88 less than or equal to g(KNA) less than or equal to and 1.15 less than or equal to g(KN Sigma) less than or equal to 1.24 by taking into account pseudoscalar mesons (pi, K) and ve ctor mesons (rho, omega, K*) field effects. Particularly, it is shown that vector mesons make significant contributions to the coupling constants g(KN Lambda) and g(KN Sigma). Our values are existing within the experimental l imits compared to the phenomenological values extracted from the kaon photo production and kaon-nucleon scattering experiments. Also, form factors are suggested for the pi NN, pi N Delta; KN Lambda and KN Sigma couplings.