Nucleon strange electromagnetic form factors
Nucleon strange electromagnetic form factors
复制标题
DOI：
10.1103/physrevd.101.031501
复制
发表时间：
2020-02-13
影响因子：
5
通讯作者：
Koutsou, G.
中科院分区：
文献类型：
--
作者：
Alexandrou, C.;Bacchio, S.;Koutsou, G.
在量子色动力学的晶格公式中，我们使用模拟来确定核子的奇怪电磁形状因子，其中包括海洋中的光、奇异和粲夸克，所有这些夸克都调整到它们的物理质量值。我们采用最先进的技术，准确地提取了高达0.8 GeV2的动量传递平方值的形状因子。我们发现电和磁形状因子在统计上都是非零的。得到奇异磁矩mu(s) = -0.017(4)(+1 0)(+5 0)，奇异磁半径< r(M)(2)>(s) = -0.015(9)(+3 0)(+4 0) fm(2)，奇异电荷半径< r(E)(2)>(s) = -0.0048(6)(0 -8)(+12 0) fm(2)，其中第一误差为统计误差，第二和第三误差为系统误差。
We determine the strange electromagnetic form factors of the nucleon within the lattice formulation of quantum chromodynamics using simulations that include light, strange and charm quarks in the sea all tuned to their physical mass values. We employ state-of-the-art techniques to accurately extract the form factors for values of the momentum transfer square up to 0.8 GeV2. We find that both the electric and magnetic form factors are statistically nonzero. We obtain for the strange magnetic moment mu(s) = -0.017(4)(+1 0)(+5 0), the strange magnetic radius < r(M)(2)>(s) is = -0.015(9)(+3 0)(+4 0) fm(2), and the strange charge radius < r(E)(2)>(s) = -0.0048(6)(0 -8)(+12 0) fm(2), where the first error is statistical, and the second and third systematic.