Single transverse spin asymmetries in hadronic pion production
Single transverse spin asymmetries in hadronic pion production
复制标题
DOI：
10.1103/physrevd.59.014004
复制
发表时间：
1998-06
影响因子：
5
通讯作者：
J. Qiu;G. Sterman
中科院分区：
文献类型：
--
作者：
J. Qiu;G. Sterman
我们用QCD分解方法分析了强子π介子在大横动量下产生的单横自旋不对称性。在大的${x}_{F}$区域，对非对称性的主要贡献自然是由耦合夸克场和胶子场强度的扭曲-3部分子关联函数产生的。用一个简单的模型，这些矩阵元素，领导阶不对称性计算QCD是一致的数据从费米实验室的π介子生产，并可以用来预测在BNL RHIC单自旋不对称性。我们认为，我们的微扰计算的不对称性是相关的π横动量低至几个GeV。
We analyze single transverse-spin asymmetries for hadronic pion production at large transverse momenta using QCD factorization. In the large ${x}_{F}$ region, leading contributions to the asymmetries are naturally produced by twist-3 parton correlation functions that couple quark fields and gluon field strengths. With a simple model for these matrix elements, leading-order asymmetries calculated from QCD are consistent with data on pion production from Fermilab, and can be used to predict single-spin asymmetries at BNL RHIC. We argue that our perturbative calculation for the asymmetries is relevant to pion transverse momenta as low as a few GeV.