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arXiv 2602.14489hep-phhep-lathep-th
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味数依赖的左手对称性破缺与共形窗口

Flavor dependence of chiral symmetry breaking and the conformal window

Beijing Institute of Technology(北京理工大学);Peking University(北京大学)

Yi-huai Chen, Yi Lu, Zhi-wei Wang, Yu-xin Liu, Fei Gao

AI总结:

该研究通过求解DSEs揭示QCD中左手对称性破缺与共形窗口的关系,确定了临界味数并分析了相变特征。

摘要:

我们研究了在真空中的量子色动力学(QCD)相结构随夸克味数$N_f$的变化情况。通过在最小QCD方案中自洽求解夸克和胶子传播子的耦合DSEs,我们阐明了动态左手对称性破缺的非微扰动力学。我们的计算确定了一个临界味数$N_f^c=6.81$,标志着夸克左手对称性的恢复。进一步分析揭示了奇异凝聚的临界指数为$-\langle\barψ ψ\rangle\sim |N_f-N_f^c|^{0.53(9)}$,表征了左手对称性相变的二级特征。此外,我们讨论了在更大味数向共形窗口的走动区域的含义。

英文摘要:

We investigate the phase structure of Quantum Chromodynamics (QCD) in the vacuum as a function of quark flavor number $N_f$ within the chiral limit. By self-consistently solving the coupled DSEs for the quark and gluon propagators in a minimal QCD scheme, we elucidate the nonperturbative dynamics governing dynamical chiral symmetry breaking. Our calculations determine a critical flavor number of $N_f^c=6.81$ which marks the chiral symmetry restoration of quarks. Further analysis reveals the critical exponents of the chiral condensate as $ -\langle\barψ ψ\rangle\sim |N_f-N_f^c|^{0.53(9)}$, characterized the second order feature of this phase transition of chiral symmetry. Additionally, we discuss the implications for the walking regime towards the conformal window at larger flavor.

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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