QCD Sum Rules Calculation of the Singlet Axial Constant

Details QCD Sum Rules Calculation of the Singlet Axial Constant QCD Sum Rules Calculation of the Singlet Axial Constant

1995-12-20

arxiv.org/abs/hep-ph/9512376v2

Phys.Atom.Nucl. 60 (1997) 455-464; Yad.Fiz. 60N3 (1997) 529-538

Physics

High Energy Physics

High Energy Physics - Phenomenology

LATEX, 21 pages, 2 figures included into the file; to be published in Phys. Atom. Nucl. The higher twist bilocal power correct

Scientific paper

We analyze the singlet axial form factor of the proton for small momentum transferred in the framework of QCD sum rules using the interpolating nucleon current which explicitly accounts for the gluonic degrees of freedom. As a result we come to the quantitative description of the singlet axial constant: G_A(0)=0.2. The bilocal power corrections play the most important role in the analysis.

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