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arXiv 0806.0644hep-lat
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格点上的双夸克和三夸克

Di-Quarks and Tri-Quarks on the Lattice

A. I. Signal, F. R. P. Bissey, 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,我们观察到在三夸克(重子)系统中,色源的空间分布范围很广时胶子通量管的形成。特别地,我们研究了两个夸克靠得很近而第三个夸克离得很远的情况,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 tri-quark (baryon) systems for a wide variety of spatial distributions of the color sources. In particular we have investigated 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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