论文标题
在非相互作用模型之外的QCD字符串上
On QCD strings beyond non-interacting model
论文作者
论文摘要
我们研究了Nambu-Goto（NG），Lüscher-Weisz（LW）和Polyakov-Kleinert（PK）弦乐动作对QCD通量管的Casimir能量在有限温度下以一个和两个循环顺序的含义。我们在有限温度下$β= 6.0 $的4-DIM PURE SU（3）YANG-MILLS晶格量规理论进行了数值研究。使用链接集成的Polyakov环路相关器计算静态夸克 - 易夸克电势。在高温接近临界点的情况下，我们发现QCD字符串的刚性和自身互动可被检测到。该模型的显着特征是它检索了重新归一化的弦张力对温度的正确依赖性。在源分离处的静态数据良好，当包括（LW）操作的其他两符号条款时，将获得$ r \ ge 0.5 $ fm。另一方面，在较低的温度下，QCD高原 - 我们检测到Lüscher-Weisz（LW）弦乐的两个边界项的特征。带边界动作的（LW）字符串产生的静态电势与晶格数据达成了很好的一致性，但是，对于颜色源分离的短短$ r = 0.3 $ fm。
We investigate the implications of Nambu-Goto (NG), Lüscher-Weisz (LW) and Polyakov-Kleinert (PK) string actions for the Casimir energy of the QCD flux-tube at one and two loop order at finite temperature. We perform our numerical study on the 4-dim pure SU(3) Yang-Mills lattice gauge theory at finite temperature $β=6.0$. The static quark-antiquark potential is calculated using link-integrated Polyakov loop correlators. At a high temperature-close to the critical point- We find that the rigidity and self-interactions effects of the QCD string to become detectable. The remarkable feature of this model is that it retrieves a correct dependency of the renormalized string tension on the temperature. Good fit to static potential data at source separations $R \ge 0.5$ fm is obtained when including additional two-boundary terms of (LW) action. On the other-hand, at a lower temperature-near the QCD plateau- We detect signatures of two boundary terms of the Lüscher-Weisz (LW) string action. The (LW) string with boundary action is yielding a static potential which is in a good agreement with the lattice data, however, for color source separation as short as $R=0.3$ fm.
