Role of unphysical solution in nucleon QCD sum rules

Journal Article · Wed Jul 01 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.014008· OSTI ID:21308514

Drukarev, E G; Ryskin, M G; Sadovnikova, V A ^[1]

---

1. Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg 188300 (Russian Federation)

We show that at certain values of QCD condensates the nucleon QCD sum rules with the 'pole+continuum' model for the hadron spectrum obtain an unphysical solution. This provides constraints for the values of condensates to be consistent with the existence of a physical solution. The constraints 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 less pronounced under a factorization assumption for the four-quark and six-quark condensates.

• OSTI ID: 21308514
• Journal Information: Physical Review. D, Particles Fields, Vol. 80, Issue 1; Other Information: DOI: 10.1103/PhysRevD.80.014008; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CONDENSATES
FACTORIZATION
MASS
MATHEMATICAL SOLUTIONS
NUCLEONS
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS
QUARK CONDENSATION
QUARKS
RADIATIVE CORRECTIONS
SPECTRA
SUM RULES