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arXiv 0812.4878hep-ph
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重子谱的若干问题:手征孤子与夸克模型

Selected problems of baryons spectroscopy: chiral soliton versus quark models

Vladimir B. Kopeliovich

摘要:

在手征孤子方法(CSA)的框架下,讨论了任意色数下刚性转动子和束缚态模型的不一致性、刚性转动子-软转动子的两难选择等重子谱的一些问题. CSA结果与简单的夸克模型的比较的后果被认为是和$1/N_c$展开的有效奇怪的反夸克质量,因为它遵循CSA。奇异反夸克的有效质量对SU(3)多重态的强依赖性是符合CSA预测所必需的。“好的”和“坏的”双夸克质量之差约为100兆电子伏,这与其他估计是合理的。描述了具有奇异性的多重子(超核),并在CSA中预测了一些感兴趣的态。

英文摘要:

Inconsistency between rigid rotator and bound state models at arbitrary number of colors, rigid rotator -- soft rotator dilemma and some other problems of baryon spectroscopy are discussed in the framework of the chiral soliton approach (CSA). Consequences of the comparison of CSA results with simple quark models are considered and the $1/N_c$ expansion for the effective strange antiquark mass is presented, as it follows from the CSA. Strong dependence of the effective strange antiquark mass on the SU(3) multiplet is required to fit the CSA predictions. The difference of `good' and `bad' diquark masses, which is about 100 Mev, is in reasonable agreement with other estimates. Multibaryons (hypernuclei) with strangeness are described and some states of interest are predicted within CSA as well.

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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