QCD vacuum tensor susceptibility
and properties of transversely polarized mesons
Joint Institute for Nuclear Research, Bogoliubov Laboratory of
Theoretical Physics, 141980, Moscow Region, Dubna, Russia
Received: 17 May 2000 / Published online: 9 August 2000 - © Springer-Verlag 2000
We re-estimate the tensor susceptibility of the QCD vacuum, , and to this end, we re-estimate the tensor coupling constants for the transversely polarized -, - and b1-mesons. The origin of the susceptibility is analyzed using (anti-)duality between the - and b1- channels in the 2-point correlator of the tensor currents. We conclude that the origin of the differences in - and b1-meson masses and tensor couplings is the (anti-)duality breakdown in QCD due to the 4-quark condensate. We confirm the results of Govaerts et al. for the 2-point correlator of the tensor currents and disagree with Belyaev and Oganesyan on both the OPE expansion and the value of the QCD vacuum tensor susceptibility. Using our value for the latter we determine new estimations of the nucleon tensor charges related to the first moment of the transverse structure function h1 of a nucleon.
Copyright Società Italiana di Fisica, Springer-Verlag 2000