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arXiv 1507.05022hep-phnucl-th
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Bethe-Salpeter方程中的四夸克态

Tetraquarks from the Bethe-Salpeter equation

Gernot Eichmann, Christian S. Fischer, Walter Heupel

摘要:

本文给出了标量四夸克Bethe-Salpeter方程的数值解。我们发现,四体方程动态产生赝标极点的Bethe-Salpeter振幅。对π极点的敏感性导致了轻的等夸克四夸克质量M ~ 400 MeV,这与sigma/f0(500)相当。它的多重态伙伴kappa和a0/f0的质量遵循类似的模式,从而为轻标量九重态的四夸克解释提供了支持。

英文摘要:

We present a numerical solution of the four-quark Bethe-Salpeter equation for a scalar tetraquark. We find that the four-body equation dynamically generates pseudoscalar poles in the Bethe-Salpeter amplitude. The sensitivity to the pion poles leads to a light isoscalar tetraquark mass M ~ 400 MeV, which is comparable to that of the sigma/f0(500). The masses of its multiplet partners kappa and a0/f0 follow a similar pattern, thereby providing support for the tetraquark interpretation of the light scalar nonet.

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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