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arXiv 0909.4237hep-exnucl-ex
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PANDA物理课程在FAIR

Physics Programme of PANDA at FAIR

Inti Lehmann

摘要:

标准模型和量子色动力学(QCD)在比核子小得多的距离上经历了严格的检验。到目前为止,预测的现象被很好地再现。然而,在与核子大小相当的距离上,新的实验结果不断出现,这些结果无法用基于QCD的有效理论一致地描述。奇异夸克和粲夸克的物理学具有连接这两个能量域的潜力,在QCD的极限尺度之间进行插值。这是将在反质子和离子研究设施(FAIR)的达姆施塔特反质子湮灭(PANDA)实验中探索的制度。在这篇文章中,详细介绍了一些最相关的物理学主题;并给出了PANDA是研究它们的理想探测器的原因。对粲偶素区域强子形成的精确研究将极大地推进我们对强子结构的理解。它可能揭示出二夸克和三夸克结构之外的粒子,其中一些粒子被预测在该质量区域具有奇异的量子数。它将加深对粲偶素光谱的理解,最近B工厂发现了不可预测的状态。到目前为止,核子的结构,在部分子分布方面,主要是使用散射实验来研究的。在PANDA测量电磁最终状态将获得补充信息。

英文摘要:

The standard model and Quantum Chromodynamics (QCD) have undergone rigorous tests at distances much shorter than the size of a nucleon. Up to now, the predicted phenomena are reproduced rather well. However, at distances comparable to the size of a nucleon, new experimental results keep appearing which cannot be described consistently by effective theories based on QCD. The physics of strange and charmed quarks holds the potential to connect the two energy domains, interpolating between the limiting scales of QCD. This is the regime which will be explored using the future Antiproton Annihilations at Darmstadt (PANDA) experiment at the Facility for Antiproton and Ion Research (FAIR). In this contribution some of the most relevant physics topics are detailed; and the reason why PANDA is the ideal detector to study them is given. Precision studies of hadron formation in the charmonium region will greatly advance our understanding of hadronic structure. It may reveal particles beyond the two and three-quark configuration, some of which are predicted to have exotic quantum numbers in that mass region. It will deepen the understanding of the charmonium spectrum, where unpredicted states have been found recently by the B-factories. To date the structure of the nucleon, in terms of parton distributions, has been mainly investigated using scattering experiments. Complementary information will be acquired measuring electro-magnetic final states at PANDA.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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