Indication on the process dependence of the Sivers effect.
Indication on the process dependence of the Sivers effect.
复制标题
表明西弗斯效应的过程依赖性。
DOI：
10.1103/physrevlett.110.232301
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发表时间：
2013
影响因子：
8.6
通讯作者：
A. Prokudin
中科院分区：
文献类型：
--
作者：
L. Gamberg;Z. Kang;A. Prokudin
本文分析了相对论重离子对撞机AnDY实验收集的质子-质子碰撞中单包容射流产生的自旋不对称性和半包容深度非弹性散射实验的Sivers不对称性。特别地，我们考虑了色规不变性在确定银效应的工艺依赖性方面所起的作用。我们发现，在仔细考虑活动部分子与极化强子残余物之间的初始态和终态相互作用后，基于HERMES和COMPASS实验提取的Sivers函数计算出的射流自旋不对称性与AnDY实验数据是一致的。这为这些过程中Sivers效应的过程依赖性提供了第一个指示。我们还对直接光子和Drell-Yan自旋不对称进行了预测，以便在未来的实验中进一步测试Sivers效应的过程依赖性。
We analyze the spin asymmetry for single inclusive jet production in proton-proton collisions collected by the AnDY experiment at the Relativistic Heavy Ion Collider and the Sivers asymmetry data from semi-inclusive deep inelastic scattering experiments. In particular, we consider the role color gauge invariance plays in determining the process dependence of the Sivers effect. We find that after carefully taking into account the initial-state and final-state interactions between the active parton and the remnant of the polarized hadron, the calculated jet spin asymmetry based on the Sivers functions extracted from HERMES and COMPASS experiments is consistent with the AnDY experimental data. This provides a first indication for the process dependence of the Sivers effect in these processes. We also make predictions for both direct photon and Drell-Yan spin asymmetry, to further test the process dependence of the Sivers effect in future experiments.