Role of unphysical solution in nucleon QCD sum rules

Details Role of unphysical solution in nucleon QCD sum rules Role of unphysical solution in nucleon QCD sum rules

2008-12-23

arxiv.org/abs/0812.4347v3

Phys.Rev.D80:014008,2009

Physics

Nuclear Physics

Nuclear Theory

13 pages, 6 figures

Scientific paper

10.1103/PhysRevD.80.014008

We show that at certain values of QCD condensates the nucleon QCD sum rules with "pole+continuum" model for the hadron spectrum obtain an unphysical solution. This provides constrains for the values of condensates to be consistent with existence of a physical solutions. The constrains become much weaker if the radiative corrections are included perturbatively. We demonstrate that the most important dependence of nucleon mass on the quark scalar condensate becomes much weaker under factorization assumption for the four-quark and six-quark condensates.

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