Tuesday, August 28, 2012

1208.5234 (F. Arbabifar et al.)

Symmetry breaking effect on determination of polarized and unpolarized
parton distributions
   [PDF]

F. Arbabifar, Ali. N. Khorramian, H. Khanpour, S. Atashbar Tehrani
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.
View original: http://arxiv.org/abs/1208.5234

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