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arXiv 0804.2549hep-lathep-ph
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轻标量介子在晶格上的模拟及其困难

Simulations of light scalar mesons on the lattice and related difficulties

Sasa Prelovsek

摘要:

本文综述了夸克-反夸克和四夸克内插场对轻标量介子的晶格模拟。指出了从标量介子中提取标量介子质量的几个困难。其中一个主要的困难是存在的两个赝标散射态,这往往占主导地位的相关在轻夸克质量。在非物理近似的模拟中,这种散射贡献甚至更令人不安,因为它们通常很大,有时甚至是负数。列出了在散射态存在下提取标量介子质量的技术。各种晶格合作的初步结果。

英文摘要:

I review the lattice simulations of light scalar mesons with quark-antiquark and tetraquark interpolating fields. Several difficulties which complicate the extraction of scalar meson masses from the scalar correlators are pointed out. One of the major difficulties is the presence of the two-pseudoscalar scattering states, which often dominate the correlator at light quark masses. In the simulations with unphysical approximations such scattering contributions are even more disturbing since they are often large and sometimes negative. Techniques which allow extraction of scalar meson masses in presence of scattering states are listed. Preliminary results of various lattice collaborations are presented.

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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