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arXiv 0710.5880hep-lat
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RBC和UKQCD合作的2+1味畴壁费米子模拟

2+1 flavour Domain Wall Fermion simulations by the RBC and UKQCD collaborations

Peter Boyle, RBC, UKQCD Collaborations

摘要:

我们回顾模拟动力畴壁费米子在一个固定的逆晶格间距为1.73GeV,与π介子质量轻为330MeV和空间尺寸为2.7fm大的RBC和UKQCD合作进行。这些结果包括手征有效拉格朗日量的赝标质量、衰变常数和低能常数。我们还回顾了中性K介子混合振幅$B_K$,Kl3形状因子,赝标介子结构和矢量介子衰变常数的结果。在重子部分,我们回顾了光谱,核子形状因子和结构函数的结果。我们的计划的重点包括初步夸克质量,并确定$V_{us}$从$f_K/f_π$和Kl3,和更新的结果$B_K$。我们发现显着的有限体积效应的核子轴向电荷$g_A$为我们的$m_π=330$兆电子伏系综上的$(2.7 {\rm fm})^3$晶格,并强调大的物理体积的重要性,为非平凡的核子物理。

英文摘要:

We review simulations of dynamical domain wall fermions at a fixed inverse lattice spacing of 1.73GeV and with pion masses as light as 330MeV and spatial dimensions as large as 2.7fm performed by the RBC and UKQCD collaborations. These results include pseudoscalar masses and decay constants and low energy constants of the chiral effective lagrangian. We also review results for the neutral kaon mixing amplitude $B_K$, the Kl3 form factor, pseudoscalar meson structure, and vector meson decay constants. In the baryon sector we review results for the spectrum, and nucleon form factors and structure functions. Highlights of our programme include preliminary quark masses, and determinations of $V_{us}$ from both $f_K/f_π$ and from Kl3, and an updated result for $B_K$. We find significant finite volume effects in the nucleon axial charge $g_A$ for our $m_π=330$ MeV ensemble on a $(2.7 {\rm fm})^3$ lattice, and highlight the importance of large physical volumes for non-trivial nucleon physics.

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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