CAJ | 학술논문

在QCD的DS方程方法框架下,文章研究了夸克-胶子顶点的着衣效应对夸克传播子的影响,也就是超越彩虹近似,利用BC顶点以及CP顶点对夸克传播子进行了系统的研究.结果发现,不论采用什么夸克-胶子顶点,夸克传播子在高动量区域趋于裸的夸克传播子,这个结论符合QCD的＂渐近自由＂特性.而在小动量区域,夸克传播子的着衣效应很大,出现了手征对称性自发破缺,夸克在低动量区域获得了很大的质量,并且不同的夸克-胶子顶点对夸克传播子的低动量区域的着衣效应差别很大.
재QCD적DS방정방법광가하,문장연구료과극-효자정점적착의효응대과극전파자적영향,야취시초월채홍근사,이용BC정점이급CP정점대과극전파자진행료계통적연구.결과발현,불론채용십요과극-효자정점,과극전파자재고동량구역추우라적과극전파자,저개결론부합QCD적＂점근자유＂특성.이재소동량구역,과극전파자적착의효응흔대,출현료수정대칭성자발파결,과극재저동량구역획득료흔대적질량,병차불동적과극-효자정점대과극전파자적저동량구역적착의효응차별흔대.
In the framework of the Dyson-Schwinger equation approach in QCD, the present study aims at the dressed effects of the quark-gluon vertex on the quark propagator, and it is also a systematic study on the quark propagator by The results sh taking the advantage of the BC vertex and the CP vertex and going beyong the rainbow approximation. ow that whatever quark-gluon vertex is used, the dressed quark propagator approaches the bare one in the high momentum region, and this resuh accords with the effect of ＂asmpotic freedom＂ in QCD. In the low momentum region, however, the chiral symmetry breaking appears and quark gains a big mass. Besides, the dressing effects of different quark-gluon vertexes on the quark propagator also differ a lot.