论文标题
核子使用三叶草和HISQ合奏充电和形式因素
Nucleon charges and form factors using clover and HISQ ensembles
论文作者
论文摘要
我们提供高统计信息($ \ MATHCAL {O}(2 \ times 10^5)$测量)初步结果(i)ISOVECTOR费用,$ g^{u-d} _ {a,s,s,t} $和form and corm and formage and corm and $ g^{u-d} _e(q^2) $G^{u-d}_A(Q^2)$, $\widetilde G^{u-d}_P(Q^2)$, $G^{u-d}_P(Q^2)$, on six 2+1-flavor Wilson-clover ensembles generated by the JLab/W&M/LANL/MIT collaboration with lattice parameters given in Table 1. Examples of the impact of using different给出了激发状态光谱的估计值,对三叶草的分子数据进行了估计,如[1]中所述,包括较低能量(接近$nπ$和$nππ$)的最大差异是在轴向通道中。 (ii)风味对角轴向,张量和标量电荷,$ g^{u,d,s} _ {a,s,s,t} $,使用使用nine 2+1+1+1+1-lover hisq组成的nine-hisq配方进行计算$ g^{u,d,s} _ {a,t} $将更新参考文献中给出的结果。[3,4]。 $ g^{u,d,s} _ {s} $和$σ_{nπ} $的估计值是新的。总体而言,重点的很大一部分是理解激发状态污染(ESC),讨论的结果提供了有关开发可辩护分析的部分状态报告,其中包括可能的低亮态激发态对单个核子矩阵元素的贡献。
We present high statistics ($\mathcal{O}(2\times 10^5)$ measurements) preliminary results on (i) the isovector charges, $g^{u-d}_{A,S,T}$, and form factors, $G^{u-d}_E(Q^2)$, $G^{u-d}_M(Q^2)$, $G^{u-d}_A(Q^2)$, $\widetilde G^{u-d}_P(Q^2)$, $G^{u-d}_P(Q^2)$, on six 2+1-flavor Wilson-clover ensembles generated by the JLab/W&M/LANL/MIT collaboration with lattice parameters given in Table 1. Examples of the impact of using different estimates of the excited state spectra are given for the clover-on-clover data, and as discussed in [1], the biggest difference on including the lower energy (close to $Nπ$ and $Nππ$) states is in the axial channel. (ii) Flavor diagonal axial, tensor and scalar charges, $g^{u,d,s}_{A,S,T}$, are calculated with the clover-on-HISQ formulation using nine 2+1+1-flavor HISQ ensembles generated by the MILC collaboration [2] with lattice parameters given in Table 2. Once finished, the calculations of $g^{u,d,s}_{A,T}$ will update the results given in Refs.[3,4]. The estimates for $g^{u,d,s}_{S}$ and $σ_{Nπ}$ are new. Overall, a large part of the focus is on understanding the excited state contamination (ESC), and the results discussed provide a partial status report on developing defensible analyses strategies that include contributions of possible low-lying excited states to individual nucleon matrix elements.