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arXiv 1409.3203hep-phhep-lathep-thnucl-th
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热QCD中的无质量模和正性破坏

Massless Mode and Positivity Violation in Hot QCD

Nan Su, Konrad Tywoniuk

摘要:

我们计算了高温单圈夸克自能,同时考虑了(色)电标度$gT$和(色)磁标度$g^2T$的贡献.在再现标准的大规模激发由于电规模,我们发现了一种新的无质量激发归因于磁尺度。这种无质量激发的剩余部分在所有温度下都是非正的,因此在夸克谱函数中引起了正性破坏。这表明了禁闭效应对热夸克集体激发的深刻影响,这表明了系统中真正的长程关联。

英文摘要:

We calculate the quark self-energy at one-loop level at high temperature, taking into account contributions from both the (chromo)electric scale $gT$ and the (chromo)magnetic scale $g^2T$. While reproducing standard massive excitations due to the electric scale, we uncover a novel massless excitation ascribable to the magnetic scale. The residue of this massless excitation is nonpositive at all temperatures, which consequently gives rise to positivity violation in the quark spectral functions. This demonstrates the profound impact of confinement effects on thermal quark collective excitations, which manifest genuine long-range correlations in the system.

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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