arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1609.02568nucl-thhep-lathep-phnucl-ex
收藏

胶子-夸克顶点的自然约束

Natural constraints on the gluon-quark vertex

Daniele Binosi, Lei Chang, Joannis Papavassiliou, Si-Xue Qin, Craig D. Roberts

摘要:

原则上,标准模型的强相互作用部分的特征在于一个独特的重整化群不变量(RGI)运行相互作用和一个独特的形式为dressed-胶子-夸克顶点,$Γ_μ$;但是,虽然已经了解了很多关于前者,后者仍然是模糊的。为了改善这种情况,我们使用一个RGI运行相互作用,调和量子色动力学(QCD)的规范扇区的自上而下和自下而上的分析,以计算$Γ_μ$的1,660,000个不同的Ansaetze缀饰夸克带隙方程的解决方案。然后测试每一种解决方案与三个物理标准的兼容性,值得注意的是,我们发现只有0.55%的解决方案通过了测试。因此,很明显,即使是一个小的选择的可观的地方非常严格的边界上的域的现实顶点Ansaetze。这一分析和它的结果应该被证明是有用的约束有见地的当代研究QCD和强子现象。

英文摘要:

In principle, the strong-interaction sector of the Standard Model is characterised by a unique renormalisation-group-invariant (RGI) running interaction and a unique form for the dressed--gluon-quark vertex, $Γ_μ$; but, whilst much has been learnt about the former, the latter is still obscure. In order to improve this situation, we use a RGI running-interaction that reconciles both top-down and bottom-up analyses of the gauge sector in quantum chromodynamics (QCD) to compute dressed-quark gap equation solutions with 1,660,000 distinct Ansaetze for $Γ_μ$. Each one of the solutions is then tested for compatibility with three physical criteria and, remarkably, we find that merely 0.55% of the solutions survive the test. Plainly, therefore, even a small selection of observables places extremely tight bounds on the domain of realistic vertex Ansaetze. This analysis and its results should prove useful in constraining insightful contemporary studies of QCD and hadronic phenomena.

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。

↑