标题： 拓扑电荷涨落的瞬子主导性在QCD中？ 显示英文标题

标题： Instanton dominance of topological charge fluctuations in QCD?

摘要： 我们考虑了由Horváth等人最近提出的Wilson-Dirac和clover改进的Wilson-Dirac格点算符的近零本征向量的局部手性。 我们研究了更细的格点，并修复了由于Wilson-Dirac矩阵的非正规性导致的正交性损失。 结果表明，在分辨率高于0.1 fm的格点上，我们确实看到了清晰的双峰结构。 我们发现，通过利用左和右本征向量的双正交系统，可以显著减少格点效应。 我们得出结论，局部手性测量并未排除瞬子在拓扑电荷涨落中的主导作用。 显示英文摘要

摘要： We consider the local chirality of near-zero eigenvectors from Wilson-Dirac and clover improved Wilson-Dirac lattice operators as proposed recently by Horv\'ath et al. We studied finer lattices and repaired for the loss of orthogonality due to the non-normality of the Wilson-Dirac matrix. As a result we do see a clear double peak structure on lattices with resolutions higher than 0.1 fm. We found that the lattice artifacts can be considerably reduced by exploiting the biorthogonal system of left and right eigenvectors. We conclude that the dominance of instantons on topological charge fluctuations is not ruled out by local chirality measurements.