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Paper   IPM / P / 7627
School of Physics
  Title:   Polarized Constituent Quarks in NLO Approximation
1.  Ali N. Khorramian
2.  S. Atashbar Tehrani
3.  A. Mirjalili
  Status:   Published
  Journal: Nucl. Phys. B Proc. Suppl.
  Vol.:  152
  Year:  2006
  Pages:   83-86
  Supported by:  IPM
The valon representation provides a basis between hadrons and quarks, in terms of which the bound-state and scattering properties of hadrons can be united and described. We studied polarized valon distributions which have an important role in describing the spin dependence of parton distribution in leading order and next-to-leading order approximation. Convolution integral in frame work of valon model as a useful tool, was used in polarized case. To obtain polarized parton distributions in a proton we need to polarized valon distribution in a proton and polarized parton distributions inside the valon. We employed Bernstein polynomial averages to get unknown parameters of polarized valon distributions by using to available experimental data.

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