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arXiv 1601.04818hep-lat
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基于近物理夸克质量的格点量子色动力学的核子广义形状因子

Nucleon generalized form factors from lattice QCD with nearly physical quark masses

Gunnar Bali, Sara Collins, Meinulf Göckeler, Rudolf Rödl, Andreas Schäfer, Andre Sternbeck

摘要:

我们用$N_f = 2$质量简并的非微扰改进的Wilson-Sheikholeslami-Wohlert费米子从晶格模拟中确定了核子的广义形状因子,其质量降到150 MeV。我们还提出了由此产生的矢量夸克角动量。可能的激发态污染进行了研究与相关的同时拟合。

英文摘要:

We determine generalized form factors of the nucleon from lattice simulations with $N_f = 2$ mass-degenerate non-perturbatively improved Wilson-Sheikholeslami-Wohlert fermions down to a pion mass of 150 MeV. We also present the resulting isovector quark angular momentum. Possible excited-state contaminations are investigated with correlated simultaneous fits.

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