Extraction of hadronic observables at finite momenta from lattice QCD (LQCD) is constrained by the well-known signal-to-noise problems afflicting all such LQCD calculations. Traditional quark smearing algorithms are commonly used tools to improve the statistical quality of hadronic n -point functions, provided operator momenta are small. The momentum smearing algorithm of Bali et?al. extends the range of momenta that are cleanly accessible and has facilitated countless novel lattice calculations. Momentum smearing has, however, not been explicitly demonstrated within the framework of distillation. In this work we extend the momentum-smearing idea by exploring a few modifications to the distillation framework. Together with enhanced time slice sampling and expanded operator bases engendered by distillation, we find ground-state nucleon energies can be extracted reliably for | p → | ? 3 ? ? GeV and matrix elements featuring a large momentum dependence can be resolved.
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机译:从晶格QCD(LQCD)的有限动量下的辐射观察的提取受到涉及所有此类LQCD计算的众所周知的信号 - 噪声问题的约束。 传统的夸克涂抹算法通常是使用工具来提高Hadronic N -Point函数的统计质量,提供的操作员Momman很小。 Bali 等的动量涂抹算法。 扩展可干净可访问的动态范围,并促进无数新颖的晶格计算。 然而,在蒸馏框架内未明确证明动量涂抹。 在这项工作中,我们通过探索蒸馏框架的几种修改来扩展势头涂抹的想法。 与蒸馏有增强的时间切片采样和扩展操作座,我们发现地面核电能量可以可靠地提取 P→| 还 3? 还 可以解决GEV和矩阵元素,其具有大量依赖的巨大依赖性。
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