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Paper   IPM / Particles / 12800
School of Particles and Accelerator
  Title:   Symmetry breaking effect on determination of polarized and unpolarized parton distributions
  Author(s): 
1 . Fatemeh Arbabifar
2 . Ali Naghi Khorramian
3 . Hamzeh Khanpour
4 . Shahin Atashbar Tehrani
  Status:   Published
  Journal: Nucl. Phys. B
  Vol.:  234
  Year:  2013
  Pages:   66-69
  Supported by:  IPM
  Abstract:
We perform a new extraction for unpolarized and polarized parton distribution functions considering a flavor decompositions for sea quarks and applying very recent deep inelastic scattering (DIS) and semi inclusive deep inelastic scattering (SIDIS) data in the fixed flavor number scheme (FFNS) framework. In the new symmetry breaking scenario the light quark and antiquark densities are extracted separately and new parametrization forms are determined for them. The heavy flavors contribution, including charm and bottom quarks, are also taken to be account for unpolarized distributions.

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