quark momentum is enhanced in comparison with the corresponding value for the hadrons with a single heavy quark. The next characteristic feature of baryons with two heavy quarks is the significant numerical impact on the lifetimes by the quark contents of hadrons, since in the third order over the inverse heavy quark mass, $1/m_Q^3$, the four-quark correlations in the total width are enforced in the effective lagrangian due to the two-particle phase space of intermediate states (see the discussion in [@vs]). In this situation, we have to add the effects of Pauli interference between the products of heavy quark decays and the quarks in the initial state as well as the weak scattering involving the quarks composing the hadron. Due to such terms we introduce the corrections depending on spectators and involving the masses of light and strange quarks in the framework of non-relativistic models with the constituent quarks, because they determine the effective physical phase spaces, strongly deviating from the naive estimates in th decays of charmed quarks. We take into account the corrections to the effective weak lagrangian due to the evolution of Wilson coefficients from the scale of the order of heavy quark mass to the energy, 