Speaker
Dr
Alinaghi Khorramian
(IPM and Semnan University)
Description
We present the results of our QCD analysis for nonsinglet
unpolarized quark distributions and structure function
F_2(x,Q^2) up to NNNLO using the Pade approximation. 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.
Primary author
Dr
Alinaghi Khorramian
(IPM and Semnan University)
Co-author
Dr
shahin Atashbar Tehrani
(IPM)
