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arXiv 0705.0916hep-ph
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相对论通量管模型下的介子和胶球谱

Meson and glueball spectra with the relativistic flux tube model

F. Buisseret

摘要:

在相对论性流管模型的框架内计算了重、轻介子的质量谱。一个很好的协议与实验数据提供的通量管的贡献,包括延迟和自旋轨道效应,是由一个胶子交换势,夸克自能项和瞬子诱导的相互作用补充。不需要任意常数来拟合质谱的绝对标度,不同的参数被拟合到格点量子色动力学上,以严格限制我们模型的任意性。在胶球的情况下讨论了本方法的相关性,并将我们计算的胶球谱与格点量子色动力学谱进行了比较。最后,我们将模型的结果与一些新发现的实验态如f_0(1810),X(3940),Y(3940)等的性质联系起来。

英文摘要:

The mass spectra of heavy and light mesons is computed within the framework of the relativistic flux tube model. A good agreement with the experimental data is obtained provided that the flux tube contributions, including retardation and spin-orbit effects, are supplemented by a one-gluon-exchange potential, a quark self-energy term and instanton-induced interactions. No arbitrary constant is needed to fit the absolute scale of the mass spectra, and the different parameters are fitted on lattice QCD in order to strongly restrict the arbitrariness of our model. The relevance of the present approach is discussed in the case of glueballs, and the glueball spectrum we compute is compared to the lattice QCD one. Finally, we make connections between the results of our model and the nature of some newly discovered experimental states such as the f_0(1810), X(3940), Y(3940), etc.

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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