Testing universality and automatic O(a) improvement in massless lattice QCD with Wilson quarks
Testing universality and automatic O(a) improvement in massless lattice QCD with Wilson quarks
复制标题
用威尔逊夸克测试无质量晶格 QCD 的普遍性和自动 O(a) 改进
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
S. Sint
中科院分区：
文献类型：
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作者：
B. Leder;S. Sint
手性旋转薛定谔泛函为通用性和自动 O(a) 改进提供了一个测试平台。我们在这里报告了在无质量极限下威尔逊夸克晶格 QCD 的广泛淬灭模拟。我们证明，在正确调整 3 维边界反项后，确实获得了预期的手性旋转边界条件。这意味着 O(a) 的自动改进，然后我们在几个例子中进行验证。通过与薛定谔泛函的标准设置进行比较，证实了正确重整化相关函数的普遍性。作为本研究的副产品，非单线电流重整化常数 ZA 和 ZV 是从 2 点函数的比率获得的。
The chirally rotated Schrodinger functional provides a test bed for universality and automatic O(a) improvement. We here report on extensive quenched simulations of lattice QCD with Wilson quarks in the massless limit. We demonstrate that, after proper tuning of a dimension 3 boundary counterterm, the expected chirally rotated boundary conditions are indeed obtained. This implies automatic O(a) improvement which we then verify in a few examples. Universality of properly renormalized correlation functions is confirmed b y comparing to the standard set-up of the Schrodinger functional. As a by-product of this study the non-singlet current renormalisation constants ZA and ZV are obtained from ratios of 2-point functions.