Structure and transitions of nucleon excitations via parity-expanded variational analysis

F. Stokes, W. Kamleh, D. Leinweber
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引用次数: 2

Abstract

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.
用宇称展开变分分析核子激发的结构和跃迁
最近引入的宇称扩展变分分析(PEVA)技术允许在有限动量的晶格上隔离重子特征态,而不受相反宇称污染。我们发现这种技术在基态核子的电磁形状因子的提取中引入了统计上显着的校正。它还允许首先提取晶格上核子激发的弹性和跃迁形式因子。我们给出了两种核子奇宇称激发的电磁弹性形状因子和螺旋幅值。这些结果为这些状态的结构提供了有价值的见解,并允许在该能量区域建立与夸克模型状态的联系。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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