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arXiv 1402.4868hep-lat
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格点量子色动力学中耦合道相互作用的量子-体积哈密顿方法

Finite-volume Hamiltonian method for coupled channel interactions in lattice QCD

Jia-Jun Wu, T. -S. H. Lee, A. W. Thomas, R. D. Young

摘要:

在$ππ$散射的多通道公式中,我们研究了使用有限体积哈密顿量方法从格点量子色动力学谱中解析散射观测量。著名的Lüscher形式主义的渐近匹配编码一个独特的有限体积谱。然而,在许多实际情况下,如耦合通道系统,它是有利的,以提取物理散射参数的插值孤立的晶格光谱。在这里,我们研究使用的哈密顿框架作为一个参数化,可以直接适合晶格光谱。我们发现,与一个适度的晶格数据量,散射参数可以再现得相当好,只有一个较小程度的模型依赖。

英文摘要:

Within a multi-channel formulation of $ππ$ scattering, we investigate the use of the finite-volume Hamiltonian approach to resolve scattering observables from lattice QCD spectra. The asymptotic matching of the well-known Lüscher formalism encodes a unique finite-volume spectrum. Nevertheless, in many practical situations, such as coupled-channel systems, it is advantageous to interpolate isolated lattice spectra in order to extract physical scattering parameters. Here we study the use of the Hamiltonian framework as a parameterisation that can be fit directly to lattice spectra. We find that with a modest amount of lattice data, the scattering parameters can be reproduced rather well, with only a minor degree of model dependence.

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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