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arXiv 1702.01035hep-lat
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利用改进的Wilson费米子开边界条件研究连续极限

Towards the continuum limit with improved Wilson fermions employing open boundary conditions

Gunnar S. Bali, Sara Collins, Fabian Hutzler, Meinulf Göckeler, Andreas Schäfer, Enno E. Scholz, Jakob Simeth, Wolfgang Söldner, André Sternbeck, Thomas Wurm

摘要:

我们提出了选定的结果,从模拟的$N_f=2+1$味道的非微扰$\mathcal{O}(a)$改进的威尔逊费米子,采用开放的边界条件的时间。这些合奏是在CLS(协调晶格模拟)的努力中以五种不同的晶格间距值创建的,范围从0.085 fm到低于0.04 fm。许多夸克质量组合被实现,特别是沿着裸夸克质量之和保持固定的线以及近似物理重整化的奇异夸克质量的轨迹。计算了介子质量、重子质量和核子轴荷等几个重要的可观测量,并给出了初步结果。在某些情况下,精确和受控地外推到连续极限已成为可能。

英文摘要:

We present selected results obtained by RQCD from simulations of $N_f=2+1$ flavours of non-perturbatively $\mathcal{O}(a)$ improved Wilson fermions, employing open boundary conditions in time. The ensembles were created within the CLS (Coordinated Lattice Simulations) effort at five different values of the lattice spacing, ranging from 0.085fm down to below 0.04fm. Many quark mass combinations were realized, in particular along lines where the sum of the bare quark masses was kept fixed as well as trajectories of an approximately physical renormalized strange quark mass. Several key observables, including meson and baryon masses and the axial charge of the nucleon have been computed, and preliminary results are presented here. In some cases an accurate and controlled extrapolation to the continuum limit has become possible.

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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