格点量子色动力学中ρ介子的Angular momentum含量
Angular momentum content of the rho-meson in lattice QCD
摘要：
变分方法允许人们研究在非微扰确定的物理状态下具有不同手征变换性质的插值函数的混合。这样就有可能以规范不变的方式定义和计算介子在产生质量的红外线中的手征和夸克-反夸克分量的分波含量。利用从手征基到LSJ基的幺正变换，可以提取介子的分波含量。我们目前的基态的ρ介子使用淬火模拟以及模拟与两个动力学夸克，所有的晶格间距接近0.15 FM的结果。我们指出，这些结果表明，在红外的ρ介子的一个简单的3S 1波组成，在SU（6）味旋夸克模型。
英文摘要：
The variational method allows one to study the mixing of interpolators with different chiral transformation properties in the non-perturbatively determined physical state. It is then possible to define and calculate in a gauge-invariant manner the chiral as well as the partial wave content of the quark-antiquark component of a meson in the infrared, where mass is generated. Using a unitary transformation from the chiral basis to the LSJ basis one may extract a partial wave content of a meson. We present results for the ground state of the rho-meson using quenched simulations as well as simulations with two dynamical quarks, all for lattice spacings close to 0.15 fm. We point out that these results indicate a simple 3S1-wave composition of the rho-meson in the infrared, like in the SU(6) flavor-spin quark model.
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