Charmonium potential from full lattice QCD
Charmonium potential from full lattice QCD
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DOI：
10.1103/physrevd.85.091503
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发表时间：
2011-10
影响因子：
5
通讯作者：
T. Kawanai;S. Sasaki
中科院分区：
文献类型：
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作者：
T. Kawanai;S. Sasaki
我们给出了调和态的中心夸克势的自旋独立和自旋依赖部分，并在2+1风味动态晶格QCD中使用PACS-CS规范配置计算，晶格截止为^{-1}~2.2 GeV。我们的模拟是在3fm^3的空间体积中，在最轻的介子质量M_\pi=156(7) MeV处，用相对论重夸克作用对粲夸克进行的。我们观察到，从几乎具有物理夸克质量的晶格QCD中得到的自旋无关的调和势与非相对论性势模型中使用的康奈尔势非常相似。自旋-自旋势适当地表现出短程排斥相互作用，其r依赖性既不同于单胶子交换产生的点状自旋-自旋势，也不同于夸克势模型中采用的现象学有限范围自旋-自旋势。
We present both spin-independent and -dependent parts of a central interquark potential for charmonium states, which is calculated in 2+1 flavor dynamical lattice QCD using the PACS-CS gauge configurations with a lattice cutoff of a^{-1}~2.2 GeV. Our simulations are performed with a relativistic heavy quark action for the charm quark at the lightest pion mass, M_\pi=156(7) MeV, in a spatial volume of 3fm^3. We observe that the spin-independent charmonium potential obtained from lattice QCD with almost physical quark masses is quite similar to the Conrnell potential used in non-relativistic potential models. The spin-spin potential properly exhibits the short range repulsive interaction, while its r-dependence is different from either a point-like spin-spin potential generated by one-gluon exchange or a phenomenological finite-range one adopted in quark potential models.