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arXiv 2307.02153hep-ph
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热重求和有效势的重整化群改进

A renormalization group improvement for thermally resummed effective potential

Koichi Funakubo, Eibun Senaha

AI总结:

本文提出一种温度依赖β函数的重整化群改进方法,使热重求和有效势的重整化群不变性逐阶成立,显著降低临界温度等相变物理量的重整化标度依赖性,并给出纳入温度依赖高阶修正的可行方案。

摘要:

我们提出了一种对热重求和有效势进行重整化群改进的新方法。在我们的方法中,由于重求和微扰理论中的发散结构,β函数依赖于温度。与通常的$\overline{\text{MS}}$方案不同,重求和有限温度有效势的重整化群不变性逐阶成立,这显著缓解了相变物理量(如临界温度)臭名昭著的重整化标度依赖性,即使在一阶水平也是如此。我们还设计了一种易于处理的方法,通过充分利用重整化群不变性,能够纳入依赖温度的高阶修正。

英文摘要:

We propose a novel method for renormalization group improvement of thermally resummed effective potential. In our method, $β$-functions are temperature dependent as a consequence of the divergence structure in resummed perturbation theory. In contrast to the ordinary $\overline{\text{MS}}$ scheme, the renormalization group invariance of the resummed finite-temperature effective potential holds order by order, which significantly mitigates a notorious renormalization scale dependence of phase transition quantities such as a critical temperature even at the one-loop order. We also devise a tractable method that enables one to incorporate temperature-dependent higher-order corrections by fully exploiting the renormalization group invariance.

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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