Parton distribution functions up to NNLO |
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| Authors: | S Atashbar Tehrani Ali N Khorramian |
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| Institution: | 1. Physics Department, Semnan University, Semnan, Iran
2. School of Particles and Accelerators, IPM (Institute for Studies in Theoretical Physics and Mathematics), P.O. Box 19395-5531, Tehran, Iran
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| Abstract: | We calculate the unpolarized parton distribution functions up to NNLO approximation from the QCD analysis of the world DIS data. To study the proton structure functions $F_2(x,Q^2)$ , we need to use the orthogonal polynomials expansion method. This method is very useful to parameterize parton distribution function at the input of $Q_0^2$ . Our calculations for parton distribution functions based on the Jacobi polynomials method are in good agreement with the other theoretical models. |
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