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

Understand

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.