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arXiv 1004.3978hep-lat
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双味格点量子色动力学中夸克质量重整化的非微扰改进

Non-perturbative improvement of quark mass renormalization in two-flavour lattice QCD

Patrick Fritzsch, Jochen Heitger, Nazario Tantalo

摘要:

我们非微扰地确定了O(a)改进的双味格点量子色动力学的重整化常数以及与重整化流和减夸克质量相关的改进系数。我们采用薛定谔泛函方案,并通过在重整化耦合的恒定值下工作来固定盒子的物理范围。我们的计算产生的结果,覆盖裸参数空间的两个区域。一个是弱耦合区,适用于大约半个费米的体积。通过在该区域进行模拟,可以在完全相对论QCD作用量下实现底重夸克的传播,并通过在有限体积内与QCD进行匹配,非微扰地解决HQET中的重整化问题。另一个区域指的是在大体积模拟的两味格点量子色动力学,我们的结果具有特殊的相关魅力物理应用的共同参数范围。

英文摘要:

We non-perturbatively determine the renormalization constant and the improvement coefficients relating the renormalized current and subtracted quark mass in O(a) improved two-flavour lattice QCD. We employ the Schrödinger functional scheme and fix the physical extent of the box by working at a constant value of the renormalized coupling. Our calculation yields results which cover two regions of bare parameter space. One is the weak-coupling region suitable for volumes of about half a fermi. By making simulations in this region, quarks as heavy as the bottom can be propagated with the full relativistic QCD action and renormalization problems in HQET can be solved non-perturbatively by a matching to QCD in finite volume. The other region refers to the common parameter range in large-volume simulations of two-flavour lattice QCD, where our results have particular relevance for charm physics applications.

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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