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arXiv 1807.05047hep-lathep-phhep-th
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多味规范理论线性西格玛模型中的质量分裂

Mass splittings in a linear sigma model for multiflavor gauge theories

Diego De Floor, Erik Gustafson, Yannick Meurice

摘要:

我们计算了描述$SU(3)$局域规范理论中标量和赝标介子的线性西格玛模型的树能级质量谱。$N_1$费米子的质量为$m_1$,而$N_2$的质量为$m_2$。利用最近的$m_1=m_2$和$N_1+N_2$ = 8或12的晶格数据,我们预测了$m_2=m_1+δm$的质量分裂。在$δm$的一阶中,一个有趣的反转模式出现在$0^{++}$扇区中,其中具有较轻费米子的介子较重。如果$m_1$和$δm$足够小,则可以在正在进行的计算中测试该特征。我们讨论的方法可能的改进。

英文摘要:

We calculate the tree-level mass spectrum for a linear sigma model describing the scalar and pseudoscalar mesons of a $SU(3)$ local gauge theory with Dirac fermions in the fundamental representation. $N_1$ fermions have a mass $m_1$ and $N_2$ a mass $m_2$. Using recent lattice data with $m_1=m_2$ and $N_1+N_2$= 8 or 12, we predict the mass splittings for $m_2=m_1+δm$. At first order in $δm$, an interesting inverted pattern appears in the $0^{++}$ sector, where mesons with lighter fermions are heavier. This feature could be tested in ongoing calculations provided that $m_1$ and $δm$ are sufficiently small. We discuss possible improvements of the approach.

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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