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arXiv 0910.0958hep-lat
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夸克-双夸克和夸克-反夸克强子胶子流管分布的比较

Comparison of gluon flux-tube distributions for quark-diquark and quark-antiquark hadrons

F. Bissey, A. I. Signal, D. B. Leinweber

摘要:

强子中胶子场的分布是QCD研究的一个基本问题。利用格点量子色动力学,我们观察到在各种色源空间分布下,三夸克(重子)和夸克加反夸克(介子)系统中胶子通量管的形成。特别地,我们研究了三种夸克构型,其中两个夸克靠得很近,第三个夸克离得很远,这近似于一个夸克加双夸克弦。我们发现,在同一格点上,夸克-双夸克弦的弦张力与夸克-反夸克弦的弦张力相同。我们还比较了两组弦的胶子通量管的纵向和横向剖面,发现它们具有相似的半径和相似的真空抑制。

英文摘要:

The distribution of gluon fields in hadrons is of fundamental interest in QCD. Using lattice QCD we have observed the formation of gluon flux tubes within 3 quark (baryon) and quark plus antiquark (meson) systems for a wide variety of spatial distributions of the color sources. In particular we have investigated three quark configurations where two of the quarks are close together and the third quark is some distance away, which approximates a quark plus diquark string. We find that the string tension of the quark-diquark string is the same as that of the quark-antiquark string on the same lattice. We also compare the longitudinal and transverse profiles of the gluon flux tubes for both sets of strings, and find them to be of similar radii and to have similar vacuum suppression.

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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