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| Paper IPM / Physic / 6778 |
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| Abstract: | |||||
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We calculate the partonic structure of constituent quark in the
Next-to-Leading Order. Using a convolution method, Structure
function of proton is presented. While the constituent quark
structure is generated purely perturbatively and accounts for the
most part of the hadronic structure, there is a few percent
contributions coming from the nonperturbative sector in the
hadronic structure. This contribution plays the key role in
explaining the SU(2) symmetry breaking of the nucleon sea and
the observed violation of Gottfried sum rule. Excellent agreement
with data in a wide range of x=[10−6,1] and
Q2=[0.5,5000] GeV2 for Fp2 is reached.
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