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| Paper IPM / Physic / 8318 |
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| Abstract: | |||||
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Sea quark distributions in the NLO approximation, based on the
phenomenological valon model or constituent quark model are
analyzed. We use the parameterized Inverse Mellin transform
technique to perform a direct fit with available experimental data and
obtain the unknown parameters of the distributions. We try to extend the
calculation to the NLO approximation for the singlet and
non-singlet cases in DIS phenomena. We do also the same
calculation for electron-positron annihilation. The resulting sea
distributions are effectively independent of the process used. The
approach of complete RG improvement(CORGI) is employed and the
results are compared with the standard approach of perturbative
QCD in the ―MS scheme with a physical scale.
The comparisons with data are in good agreement. As is expected, the
results in the CORGI approach indicate a better agreement
to the data than the NLO calculation in the standard approach.
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