PROBABILITY OF Z-](B)OVER-BAR-B DECAY AND ANOMALOUS PROPERTIES OF THE T-QUARK

In the framework of the model of the dynamical breaking of the electroweak symmetry we consider the problem of possible disagreement of the probability of Z --> ($) over bar bb decay with standard model calculations. The large anomalous magnetic moment of the t-quark, inherent to the model, leads to a weak magnetic term in the W ($) over bar tb vertex. This term in the one loop approximation gives the contribution to the Z --> ($) over bar bb amplitude, which leads to an increase of the probability. Estimates show that the model gives a consistent description of existing data. Ways to check the validity of the model are indicated.