Single spin asymmetries in inclusive high energy hadron-hadron collision processes
Single spin asymmetries in inclusive high energy hadron-hadron collision processes
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DOI：
10.1142/s0217751x0000046x
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发表时间：
1996-04
期刊：
影响因子：
--
通讯作者：
Z. Liang;C. Boros
中科院分区：
文献类型：
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作者：
Z. Liang;C. Boros
长期以来人们已经认识到，单自旋实验，其中一个碰撞物体是横向极化的，可以帮助研究一般的强相互作用的性质，特别是在测试量子色动力学（QCD）。在过去的几年里，我们观察到了一些与微扰QCD部分子模型的预期有很大偏差的惊人效应。这些影响备受关注。类似类型的新实验正在进行和/或计划中。为了理解这些效应，人们进行了不同的理论尝试。本文着重介绍了单极化高能强子-强子碰撞在高能自旋物理中的特殊作用。本文简要地总结了有关包容性强子产生的现有数据的特点。不同的理论方法，这样的过程进行审查，特别注意的非微扰模型，明确考虑到价夸克和强子表面效应的轨道运动。这种不对称性和超子极化之间的联系在非极化反应进行了讨论。给出了这种实验结果在其它过程中可能应用的一个例子。
It has been realized for quite a long time that single-spin experiments, in which one of the colliding objects is transversely polarized, can be helpful in studying the properties of strong interaction in general and in testing Quantum Chromodynamics (QCD) in particular. Striking effects have been observed in the past few years which deviate drastically from the expectation of the perturbative QCD parton model. These effects have received much attention. New experiments of the similar type are underway and/or planned. Different theoretical attempts have been made to understand these effects. In this review, the special role played by singly polarized high-energy hadron-hadron collisions in High Energy Spin Physics is emphasized. Characteristics of the available data for inclusive hadron productions are briefly summarized. Different theoretical approaches for such processes are reviewed with special attention to a non-perturbative model which explicitly takes the orbital motion of the valence quarks and hadronic surface effects into account. The connection between such asymmetries and hyperon polarization in unpolarized reactions is discussed. An example of the possible application of such experimental results in other processes is given.