Global analysis of helicity parton densities and their uncertainties.
Global analysis of helicity parton densities and their uncertainties.
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DOI：
10.1103/physrevlett.101.072001
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发表时间：
2008-04
影响因子：
8.6
通讯作者：
D. de Florian;R. Sassot;M. Stratmann;W. Vogelsang
中科院分区：
文献类型：
--
作者：
D. de Florian;R. Sassot;M. Stratmann;W. Vogelsang
本文对核子的螺旋度部分子分布作了新的分析。分析考虑到现有的数据，从包容性和半包容性的极化深非弹性散射，以及从极化质子-质子（p-p）散射在RHIC。对于第一次，所有的理论计算完全在下一个领导阶（NLO）的微扰QCD，使用的方法，允许在一个非常快速和有效的方式在分析中纳入的NLO校正。我们发现一个相当小的胶子极化的核子的证据，在有限的区域的动量分数，和有趣的风味模式极化的海洋。
We present a new analysis of the helicity parton distributions of the nucleon. The analysis takes into account the available data from inclusive and semi-inclusive polarized deep inelastic scattering, as well as from polarized proton-proton (p-p) scattering at RHIC. For the first time, all theoretical calculations are performed fully at next-to-leading order (NLO) of perturbative QCD, using a method that allows incorporation of the NLO corrections in a very fast and efficient way in the analysis. We find evidence for a rather small gluon polarization in the nucleon, over a limited region of momentum fraction, and for interesting flavor patterns in the polarized sea.