论文标题
核子激发的结构和跃迁通过平等扩展的变分分析
Structure and transitions of nucleon excitations via parity-expanded variational analysis
论文作者
论文摘要
最近引入的平价扩展的变异分析（PEVA）技术允许在有限动量的晶格上分离baryon本特征状态，而不受相反的污染。我们发现该技术在基态核子的电磁形式因子的提取中引入了统计学上的显着校正。它还允许在晶格上的弹性和过渡形式的首次提取。我们介绍了核子的两种奇数激励的电磁弹性形式和螺旋幅度。这些结果为这些状态的结构提供了宝贵的见解，并允许与该能量区域的夸克模型状态建立联系。
The recently-introduced Parity Expanded Variational Analysis (PEVA) technique allows for the isolation of baryon eigenstates on the lattice at finite momentum free from opposite-parity contamination. We find that this technique introduces a statistically significant correction in extractions of the electromagnetic form factors of the ground state nucleon. It also allows first extractions of the elastic and transition form factors of nucleon excitations on the lattice. We present the electromagnetic elastic form factors and helicity amplitudes of two odd-parity excitations of the nucleon. These results provide valuable insight into the structure of these states, and allow for a connection to be made to quark-model states in this energy region.
