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arXiv 0710.1263hep-lat
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小晶格间距下N_f=2模拟的准备

Preparing for N_f=2 simulations at small lattice spacings

M. Della Morte, P. Fritzsch, B. Leder, S. Takeda, O. Witzel, U. Wolff, H. Meyer, H. Simma, R. Sommer

摘要:

我们讨论了动力学费米子的一些大的影响。一个是截止效应,另一个是多π介子态对关联函数的贡献,并有望在连续极限下存活。然后,我们转向小晶格间距的模拟准备,我们计划将其降低到a=0.04fm左右,以了解标准O(a)改进理论的O(a^2)效应的大小。通过薛定谔泛函重整化耦合确定了晶格间距对裸耦合的依赖关系。

英文摘要:

We discuss some large effects of dynamical fermions. One is a cutoff effect, others concern the contribution of multi-pion states to correlation functions and are expected to survive the continuum limit. We then turn to the preparation for simulations at small lattice spacings which we are planning down to around a=0.04fm in order to understand the size of O(a^2)-effects of the standard O(a)-improved theory. The dependence of the lattice spacing on the bare coupling is determined through the Schr"odinger functional renormalized coupling.

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