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arXiv 1703.04871hep-thhep-ph
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Yang-Mills方程的热力学几何

Thermodynamic Geometry of Yang-Mills Vacua

Stefano Bellucci, Bhupendra Nath Tiwari

摘要:

我们研究了一个$SU(N)$规范理论组态系综的真空涨落性质,在大量色数的极限下,\textit{viz.} $N_c \rightarrow \infty$,并通过分析它在非零真空参数$θ$和温度$T$下的临界行为来探讨拓扑磁化率的统计性质.我们发现,该系统经历了真空相变的手征对称性恢复温度以及在$θ$的绝对值。另一方面,对于具有临界指数$e=2$或$T=T_d+1$的理论,长程相关长度仅取决于$θ$,其中$T_d$是退相干温度。此外,值得注意的是,单位临界指数真空组态对应于与恒定质量$η^{\prime}$有关的非相互作用统计基础。

英文摘要:

We study vacuum fluctuation properties of an ensemble of $SU(N)$ gauge theory configurations, in the limit of large number of colors, \textit{viz.} $N_c \rightarrow \infty$, and explore statistical nature of the topological susceptibility by analyzing its critical behavior at a nonzero vacuum parameter $θ$ and temperature $T$. We find that the system undergoes a vacuum phase transition at the chiral symmetry restoration temperature as well as at an absolute value of $θ$. On the other hand, the long range correlation length solely depends on $θ$ for the theories having critical exponent $e=2$ or $T=T_d+1$, where $T_d$ is the decoherence temperature. Further, it is worth noticing that the unit critical exponent vacuum configuration corresponds to a noninteracting statistical basis pertaining to a constant mass of $η^{\prime}$.

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