  We re-estimate the tensor susceptibility of QCD vacuum, $\chi $, and to this
end, we re-estimate the leptonic decay constants for transversely polarized
$\rho $- ,~$\rho'$- and b_1-mesons. The origin of the susceptibility is
analyzed using duality between $\rho$- and b_1- channels in a 2-point
correlator of tensor currents. We confirm the results in Nucl.Phys.
B283(1987)706 for the 2-point correlator of tensor currents and disagree with
Phys.Lett. B395(1997)307 on both OPE expansion and the value of QCD vacuum
tensor susceptibility. Using our value for the latter we determine new
estimations of nucleon tensor charges related to the first moment of the
transverse structure function h_1 of a nucleon.
