高能反应机制与自旋效应

高能强子一强子反应实验中发现一系列引人注目的自旋效应,这些效应出现的机理一直是人们关注的热门课题之一.近几年,在实验及理论家共同的努力下,虽仍有许多不清楚的问题,但已取得一些突破.结果表明,不仅对这些现象产生机理研究能为强子结构及强子反应机制提供信息,而且这些现象本身也用作探索强子反应机制的工具.例如用它们来研究小x_B光子与强子反应的性质.本报告将首先简单总结这些现象及其产生机理研究的结论,然后介绍该例的主要思想及结果.

Spin Effects and High Energy Reaction Mechanisms

ms is the written version of my talk given at the sib Chinese NationalConference on High Energy Physics held in Chengde, April 21st to 25th, 1998. Anumber of striking spin effects have been observed in high energy hadron-hadroncollision experiments. Searching the origins of these effects has been and is a hottopic in High Energy Physics. In the past few years, with the common efforts of theexperimentalists and theorehans, a large step forward has been made although manyquestions still remain to be answered. T'hese results show that the study of the originsof these effects can indeed provide useful information for hadron structure and highenergy reaction mechanisms. It shows also that these effects themselves can be usedas a tool to probe these mechanisms. For example, it has been pointed out that, theymay be used to study the properties of reaction of small-xB virtual photon withhadrons. In this talk, I will briefly summarize the experimental results on these effectsand the main conclusions of the theoretical studies, and then make a brief introductionto the main ideas and the results.