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arXiv 2301.03323hep-thhep-ph
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具有紫外截断的量子场论中的维度正则化

Dimensional Regularization in Quantum Field Theory with Ultraviolet Cutoff

Durmus Demir, Canan Karahan, Ozan Sargın

AI总结:

本文提出分离正则化,将维度正则化扩展到带紫外截断的量子场论,独立处理幂律与对数发散,应用于真空能及标量、旋量电动力学,并验证藤川重正化至两环有效。

摘要:

鉴于各种场论方面的原因,在本工作中,我们研究了通常的维度正则化能否以保持维度正则化所有性质的方式扩展到具有紫外截断(庞加莱破缺尺度)的量子场论。我们发现它确实可以。由此产生的扩展给出了一个框架,在该框架中,幂律发散和对数发散被分离,涉及不同的尺度。这种新的正则化方案,我们称之为分离正则化,使得人们能够不同地且独立地处理幂律发散和对数发散。我们将分离正则化应用于真空能的计算以及两个著名的量子场论,即标量电动力学和旋量电动力学。作为案例研究,我们在分离正则化的框架下考虑了藤川的减除重正化,并通过专门研究标量自能展示了其高达两环的有效性。我们讨论了分离正则化的各种应用领域。

英文摘要:

In view of various field-theoretic reasons, in the present work, we study the question of if the usual dimensional regularization can be extended to quantum field theories with an ultraviolet cutoff (Poincare-breaking scale) in a way preserving all the properties of the dimensional regularization. And we find that it can indeed be. The resulting extension gives a framework in which the power-law and logarithmic divergences get detached to involve different scales. This new regularization scheme, the detached regularization as we call it, enables one to treat the power-law and logarithmic divergences differently and independently. We apply the detached regularization to the computation of the vacuum energy and to two well-known QFTs namely the scalar and spinor electrodynamics. As a case study, we consider Fujikawa's subtractive renormalization in the framework of the detached regularization, and show its effectiveness up to two loops by specializing to scalar self energy. We discuss various application areas of the detached regularization.

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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