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arXiv 1602.01169nucl-th
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从核子共振提取到LQCD

From Extraction of Nucleon Resonances to LQCD

T. -S. H. Lee, Jia-jun Wu, Hiroyuki Kamano

摘要:

本文用几种精确可解的$ππ$散射模型说明了从反应数据中提取强子共振的内在困难。本文用有限体积哈密顿量方法预测了$πN$反应的两个介子交换哈密顿量。在一个包含$πN$、$πΔ$和$σN$通道的三通道模型中,我们展示了有限体积哈密顿方法相对于使用Lüscher公式来检验格点量子色动力学计算的优势,该方法旨在预测核子共振。我们讨论了使用ANL-Osaka八通道哈密顿量来预测用于测试LQCD计算的光谱的必要步骤,以确定不变质量$W= 2 $ GeV的激发态核子。

英文摘要:

The intrinsic difficulties in extracting the hadron resonances from reaction data are illustrated by using several exactly soluble $ππ$ scattering models. The finite-volume Hamiltonian method is applied to predict spectra using two meson-exchange Hamiltonians of $πN$ reactions. Within a three-channel model with $πN$, $πΔ$ and $σN$ channels, we show the advantage of the finite-volume Hamiltonian method over the approach using the Lüscher formula to test Lattice QCD calculations aimed at predicting nucleon resonances. We discuss the necessary steps for using the ANL-Osaka eight-channel Hamiltonian to predict the spectra for testing the LQCD calculations for determining the excited nucleon states up to invariant mass $W= 2 $ GeV.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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