论文标题
关于用稳定的Wilson Fermions改善轴向向量电流
On improvement of the axial-vector current with stabilised Wilson fermions
论文作者
论文摘要
我们在稳定的Wilson-Clover Fermions的框架内报告了改进系数$ c _ {\ rm a} $的改进系数$ c _ {\ rm a} $。这是通过要求PCAC关系保留两个不同的伪量表状态来完成的。为了生成这些状态，采用了Schrödinger功能晶格边界上的空间结构的波形，并探索了（先前应用的）波函数方法的某些变化。改进系数是在几个合奏中确定的，用于一系列量规耦合，这可能对未来的应用有用。还显示了轴向矢量电流的向量电流的肾小效应常数$ z {\ rm v} $的初步结果。
We report on the determination of the improvement coefficient $c_{\rm A}$ for the non-singlet axial-vector current $A^{a}_μ(x)$ in the framework of stabilised Wilson-Clover fermions within three flavour lattice QCD. This is done by requiring the PCAC relation to hold for two different pseudo-scalar states. To generate these states, wavefunctions altering spatial structures on the boundaries of a Schrödinger functional lattice are employed and some variations of the (previously applied) wavefunction method are explored. The improvement coefficient is determined on a few ensembles for a range of gauge couplings that is potentially useful for future applications. Preliminary results on the renormalisation constants $Z_{\rm V}$ for the vector current and $Z_{\rm A}$ for the axial-vector current are also presented.
