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Dispersive Approach to Abelian Axial Anomaly and Mixing
Y. N. Klopot, A. G. Oganesian, O. V. Teryaev
We investigate what can be learnt about the - mixing by means of dispersive representation of axial anomaly. We show that our method leads to the strong bounds for the $η-η…
Reanalysis of QCD sum rules for nucleon with perturbative correction
A. Oganesian
A new analysis of baryon sum rules is done with modern values of parameters and known perturbative corrections. The restriction for gluon and quark condensates and the new value of…
Quark distributions in polarized and nonpolarized hadrons
A. G. Oganesian
Valence quark distributions in pion, polarizied mesons and nucleon in the region of intermediate are obtained by generalizied QCD sum rules. It is shown, that polarization…
Quark distributions in polarized rho meson and its comparison with those in pion
A. G. Oganesian
Valence quark distributions in transversally and longitudinally polarizied rho mesons in the region of intermediate x are obtained by generalizied QCD sum rules. Power corrections…
Proton spin content, axial coupling constant and QCD topological susceptibility
B. L. Ioffe, A. Oganesian
The part of the proton spin carried by quarks is calculated in the framework of the QCD sum rules in the external fields. The operators up to dimension 9 are accounte…