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NNLO QCD contributions to the flavor non-singlet sector of {bf {F₂(x,Q²)}}

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arxiv 0805.3063 v2 pith:Q7VMHI2A submitted 2008-05-20 hep-ph

NNLO QCD contributions to the flavor non-singlet sector of {bf {F₂(x,Q²)}}

classification hep-ph
keywords functionnonsingletquarkstructureanalysiscontributionsdistributionsjacobi
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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