Next-to-leading-order radiative parton model analysis of polarized deep inelastic lepton-nucleon scattering.
Next-to-leading-order radiative parton model analysis of polarized deep inelastic lepton-nucleon scattering.
复制标题
偏振深层非弹性轻子-核子散射的次前导辐射部分子模型分析。
DOI：
10.1103/physrevd.53.4775
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
W. Vogelsang
中科院分区：
文献类型：
--
作者：
M. Glück;E. Reya;M. Stratmann;W. Vogelsang
在辐射部分子模型的框架下，对极化深度非弹性轻子-核子散射中的自旋不对称性和结构函数进行了次主阶QCD分析。在传统的MS因式分解方案中，极化部子分布的{italq}{sup2}演化的一致的NLO公式产生了两组合理的NLO自旋相关的部分子分布。它们尊重基本正性约束，一直到低分辨率标度{italq}{sup 2}={u}{sup 2}{subNLO}=0.34GeV{sup 2}。自旋不对称性的{italQ}{sup2}自旋不对称性{italA}{sup{italp}，{italn}，{itald}}{sub1}({italx}，{italq}{sup2})类似于在1{le}{italq}{sup2}范围内的主序(LO)依赖关系，并且被证明对于与分析当前数据和可能在DESY HERA即将到来的数据有关的{italx}值是不可忽略的。{版权所有}{1996年美国物理学会。}
A next-to-leading-order QCD analysis of spin asymmetries and structure functions in polarized deep inelastic lepton-nucleon scattering is presented within the framework of the radiative parton model. A consistent NLO formulation of the {ital Q}{sup 2} evolution of polarized parton distributions yields two sets of plausible NLO spin-dependent parton distributions in the conventional MS factorization scheme. They respect the fundamental positivity constraints down to the low resolution scale {ital Q}{sup 2}={mu}{sup 2}{sub NLO}=0.34 GeV{sup 2}. The {ital Q}{sup 2} dependence of the spin asymmetries {ital A}{sup {ital p},{ital n},{ital d}}{sub 1}({ital x},{ital Q}{sup 2}) is similar to the leading-order (LO) one in the range 1{le}{ital Q}{sup 2}{le}20 GeV{sup 2} and is shown to be non-negligible for {ital x} values relevant for the analysis of the present data and possibly forthcoming data at DESY HERA. {copyright} {ital 1996 The American Physical Society.}