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| Paper IPM / Particles / 13133 |
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| Abstract: | |||||||
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The results of our new QCD analysis of helicity parton distributions of the nucleon at full next-to-leading
order accuracy in the fixed-flavor number scheme are presented. Performing a combined QCD fit on the
global sets of latest inclusive and the semi-inclusive polarized deep inelastic scattering data, we are able to
extract new polarized parton distribution functions (PPDFs) at the input scale Q20
¼ 1 GeV2. Particularly,
we calculate PPDFs considering light sea-quark decomposition, and the results are compared with the
experimental data and the most precise theoretical models obtained by recent analyses. The latest
COMPASS2010 SIDIS data, which were not used in the combined analyses before 2010, are employed in
the current analysis, and the effect of COMPASS SIDIS data is studied in detail. Also, the uncertainties of
PPDFs are determined using the standard Hessian technique
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