“School of Particles And Accelerator”

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Paper   IPM / Particles And Accelerator / 11294
School of Particles and Accelerator
  Title:   Determination of valance Quark Distributions in Higher Order of Perturbative QCD
1.  Hamzeh Khanpour
2.  Ali Naghi Khorramian
3.  Shahin Atashbar Tehrani
4.  Abolfazl Mirjalili
  Status:   Published
  Journal: Acta. Phy. Polonica B
  No.:  11
  Vol.:  40
  Year:  2009
  Pages:   2971-2975
  Supported by:  IPM
We perform N3LO QCD analysis of the world data on the unpolarized DIS structure functions to determine s and valance quark distributions with fully correlated errors. Due to increasing the accuracy of DIS experiments and reduction the experimental errors on determining the strong coupling constant, the higher order analysis is required. The Pad� approximations are used to estimate the 4-loop anomalous dimension. We consider the non-singlet sector of parton distributions in our calculations. A comparison of the N3LO/N2LO with N3LO/NLO ratios for up and down valence quark distributions indicate outstanding influence of the higher order analysis.

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