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arXiv 0807.4207hep-phhep-exnucl-exnucl-th
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J-PARC的高能强子物理

High-energy hadron physics at J-PARC

S. Kumano

摘要:

J-PARC设施已接近完工,将于2009年开始进行核物理和粒子物理项目的实验。本文介绍了J-PARC装置,并讨论了利用30-50 GeV的初级质子束进行高能强子物理研究的可能方案。有人建议进行粲产生和Drell-Yan过程以及单自旋不对称性的实验,以研究核子和原子核的夸克和胶子结构。部分子能量损失可以在Drell-Yan过程中研究。还有一个建议,强子质量修改在核介质中使用质子束。此外,可能的主题包括从强子过渡到夸克自由度的弹性pp散射,色透明的(p,2 p),短程关联的核力的(p,2 pN),张量结构函数的自旋一强子,碎裂功能,和广义部分子分布在ERBL区域,虽然建议没有写在这些项目。如果质子束极化达到,就有可能研究核子自旋结构的细节。在本文的最后,结合J-PARC项目,介绍了我们对部分子分布函数的研究。

英文摘要:

The J-PARC facility is near completion and experiments will start in 2009 on nuclear and particle physics projects. In this article, the J-PARC facility is introduced, and possible projects are discussed in high-energy hadron physics by using the primary proton beam of 30-50 GeV. There are proposed experiments on charm-production and Drell-Yan processes as well as single spin asymmetries for investigating quark and gluon structure of the nucleon and nuclei. Parton-energy loss could be studied in the Drell-Yan processes. There is also a proposal on hadron-mass modifications in a nuclear medium by using the proton beam. In addition, possible topics include transition from hadron to quark degrees of freedom by elastic pp scattering, color transparency by (p,2p), short-range correlation in nuclear force by (p,2pN), tensor structure functions for spin-one hadrons, fragmentation functions, and generalized parton distributions in the ERBL region although proposals are not written on these projects. If proton-beam polarization is attained, it is possible to investigate details of nucleon spin structure. In the last part of this article, our own studies are explained on parton distribution functions in connection with the J-PARC projects.

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