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Paper   IPM / Physic / 7631
School of Physics
  Title:   QCD Predictions for Spin Dependence of Parton Distributions
  Author(s): 
1.  S. Atashbar Tehrani
2.  Ali N. Khorramian
3.  A. Mirjalili
  Status:   Published
  Journal: Commun Theor Phys
  No.:  6
  Vol.:  43
  Year:  2005
  Pages:   1087-1098
  Supported by:  IPM
  Abstract:
We introduce the polarized valon distributions to describe the spin dependence of parton distributions. The polarized valon distributions in the proton and polarized parton distributions inside the valon can help to obtain polarized parton distribution in a proton. In order to be able to obtain the spin contribution of sea quarks, we need to improve the valon model. We employ the Bernstein polynomial averages to obtain the unknown parameters which exist in our calculations. Our results for the polarized proton structure function, xg 1p, are in good agreement with the experimental data for some values of Q2.

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