标题： 研究离壳下 $π^{o}- η$ 混合的夸克环效应建模 显示英文标题

标题： Modelling the Off-Shell Dependence of $π^{o}- η$ Mixing with Quark Loops

摘要： 结果表明，在Georgi-Manohar手征夸克模型中包含夸克与赝标介子耦合的形式因子，允许人们从夸克圈效应对介子传播子的影响出发，得到由手征微扰理论所预言的$\pi^{o}- \eta$混合的主导非定域依赖性。 此外，还讨论了对$\rho^{o} - \omega$混合以及对少数体电荷对称性破缺可观测量的介子混合贡献的影响。 显示英文摘要

摘要： It is shown that including form factors for the quark-pseudoscalar meson couplings of the Georgi-Manohar chiral quark model allows one to obtain the leading off-shell dependence of $\pi^{o}- \eta$ mixing (as predicted by chiral perturbation theory) from the effect of quark loops on the meson propagators. Implications for $\rho^{o} - \omega$ mixing and for the effects on meson mixing contributions to few body charge symmetry breaking observables are also discussed.