Jul 16 – 22, 2009
Kraków, Poland
Europe/Warsaw timezone

Pade approximation and non-singlet structure function up to N^3LO

Not scheduled
Auditorium Maximum (Kraków, Poland)

Auditorium Maximum

Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Poster session


Dr Alinaghi Khorramian (IPM and Semnan University)


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)


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