38 citations · 199 across the 30 of their papers we have counts for
10 papers · 1 filter
On the loop approximation in nucleon QCD sum rules
E. G. Drukarev, M. G. Ryskin, V. A. Sadovnikova
There was a general believe that the nucleon QCD sum rules which include only the quark loops and thus contain only the condensates of dimension d=3 and d=4 have only a trivial sol…
QCD sum rules for the nucleon and the non-locality of quark condensates
M. G. Ryskin, V. A. Sadovnikova
We emphasize the role of the x dependence of the quark condensate <|\bar q(0)q(x)|> originated by the zero fermion modes in the instanton vacuum. The effect is not negligible since…
Nucleon QCD sum rules in instanton vacuum
E. G. Drukarev, V. A. Sadovnikova
We calculate the polarization operator of the nucleon current in the instanton medium. The medium (QCD vacuum) is assumed to be a composition of the instantons of large and small s…
Non-locality of the scalar quark condensate
M. G. Ryskin, E. G. Drukarev, V. A. Sadovnikova
We suggest a somewhat indirect method for estimation of the nonlocal scalar quark condensate. The approach is based on analysis of the polarization operator of nucleon current in i…
Dependence of nucleon mass on parameters of instanton medium
E. G. Drukarev, E. L. Kryshen, M. A. Matveev +2
We trace the dependence of the nucleon mass and of the effective size of the nucleon on the characteristics of the instanton medium, which are the average instanton size and th…
Nucleon QCD sum rules in instanton medium
M. G. Ryskin, E. G. Drukarev, V. A. Sadovnikova
We try to find the grounds for the standard nucleon QCD sum rules, based on more detailed description of QCD vacuum. We calculate the polarization operator of the nucleon current i…