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arXiv 0709.2316hep-ph
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来自双回路2PI有效action的QED压力

The pressure of QED from the two-loop 2PI effective action

Szabolcs Borsanyi, Urko Reinosa

摘要:

我们从2PI有效作用量的双圈截断计算了热量子电动力学的压强。由于2PI重算保证了规范固定的独立性仅达到截断的量级,所以我们的压力结果呈现出O(e^4)的规范依赖贡献。我们用数值方法描述了这种规范依赖计算的可信性,发现当xi<1时,由于规范参数依赖引起的不确定性是可控的。我们的计算还表明,朗道规范的选择可以最大限度地减少规范依赖的影响。

英文摘要:

We compute the pressure of hot quantum electrodynamics from the two-loop truncation of the 2PI effective action. Since the 2PI resummation guarantees gauge-fixing independence only up to the order of the truncation, our result for the pressure presents a gauge dependent contribution of O(e^4). We numerically characterize the credibility of this gauge-dependent calculation and find that the uncertainty due to gauge parameter dependence is under control for xi<1. Our calculation also suggests that the choice of Landau gauge may minimize gauge-dependent effects.

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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