NNLO QCD contributions to the flavor non-singlet sector of ${\bf {F_2(x,Q^2)}}$

Details NNLO QCD contributions to the flavor non-singlet sector of ${\bf {F_2(x,Q^2)}}$ NNLO QCD contributions to the flavor non-singlet sector of ${\bf {F_2(x,Q^2)}}$

2008-05-20

arxiv.org/abs/0805.3063v2

Phys.Rev.D78:074019,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

29 pages, 8 figures

Scientific paper

10.1103/PhysRevD.78.074019

We present the results of our QCD analysis for nonsinglet unpolarized quark distributions and structure function $F_2(x,Q^2)$. New parameterizations are derived for the nonsinglet quark distributions for the kinematic wide range of $x$ and $Q^2$. The analysis is based on the Jacobi polynomials expansion of the structure function. The higher twist contributions of proton and deuteron structure function are obtained in the large $x$ region. Our calculations for nonsinglet unpolarized quark distribution functions based on the Jacobi polynomials method are in good agreement with the other theoretical models. The values of $\Lambda_{QCD}$ and $\alpha_s(M_z^2)$ are determined.

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