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arXiv 0911.3128hep-ph
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强子与手征对称性

Hadrons and Chiral Symmetry

Thomas D. Cohen

摘要:

这些讲座讨论的问题,是否一个关键的功能是在强子光谱-强子与不同的宇称和/或自旋的近简并。据证实,这是由于有效地恢复了手征对称性。推测是,虽然这些状态当然是在对称性破缺(Nambu-Goldstone)阶段,但随着光谱的升高,这些状态对手征对称性破缺的动力学变得越来越不敏感。这些讲座讨论这个猜想的现状。猜想的动机进行了讨论,因为是证据-理论和实验-在它的青睐。可能的替代解释的数据进行了讨论。

英文摘要:

These lectures discuss the question of whether a key feature is seen in hadron spectroscopy--the near degeneracy of hadrons with different parity and/or spin. It has been conjectured that this is due to an effective restoration of chiral symmetry. The conjecture is that while these states are, of course, in the symmetry-broken (Nambu-Goldstone) phase, as one goes higher in the spectrum the states become progressively less sensitive to the dynamics of chiral symmetry breaking. These lectures discuss the current status of this conjecture. The motivations for the conjecture are discussed, as is evidence--both theoretical and experimental--in its favor. Possible alternative explanations for the data are also discussed.

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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