ИСТИНА

Nonfactorizable corrections induced by charm-quark loops in exclusive FCNC B- decays (i.e. B- decays induced by avour-changing neutral currents) are discussed. We show that a consistent calculation of the appropriate QCD correlation function requires the full generic three-particle distribution amplitude (3DA) of the B- meson ⟨0|q(x)G(y)b(0)|B(p)⟩ with non-aligned arguments: Expanding the latter 3DA amplitude near the light cone, one finds that the B-decay correlation function is dominated by the regions x2 = 0 and y2 = 0 but (x - y)2 ̸= 0. As the result, for a proper description of the amplitudes of FCNC B-decays, the full dependence of the 3DA on the variable (x - y)2 is necessary.