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arXiv 2603.06296hep-phastro-ph.COhep-th
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重新审视非最小耦合标量场的单位性

Revisiting unitarity of single scalar field with non-minimal coupling

Center for Theoretical Physics of the Universe, Institute for Basic Science (IBS)(基础科学研究院宇宙理论物理中心);Department of Physics, Graduate School of Science, The University of Tokyo(东京大学理学研究科物理学系);Research Center for the Early Universe (RESCEU), Graduate School of Science, The University of Tokyo(东京大学理学研究科早期宇宙研究中心);Kavli Institute for the Physics and Mathematics of the Universe (WPI), UTIAS, The University of Tokyo(东京大学汤川理论物理研究所 Kavli 宇宙物理数学研究所);Theory Center, IPNS, KEK(高能加速器研究机构理论物理中心);Graduate University for Advanced Studies (Sokendai)(综合研究大学院大学)

Minxi He, Muzi Hong, Kyohei Mukaida, Tomoya Nishiki

AI总结:

本文研究非最小耦合标量场的单位性违反尺度,通过计算不同框架下的散射幅,证明结果的框架无关性,并分析自耦项对结果的影响。

摘要:

我们研究了非最小耦合标量场(具有四自耦项)的单位性违反尺度。该模型在文献中被广泛研究,但关于单位性违反尺度的估计尚未一致讨论,尤其是在Jordan框架中。我们计算了标量粒子在Jordan框架和Einstein框架下的六点散射幅,并明确展示了结果的框架无关性。由于单场情况下扩展的目标空间(含共形模式)是平凡的,主导贡献来自标量场的势能。在自耦项消失极限下,两个框架的结果都变得平凡,这与预期一致。

英文摘要:

We have investigated the unitarity violation scale of a non-minimally coupled scalar field with quartic self-coupling. This model is widely studied in the literature but the estimation of the unitarity violation scale has not been consistently discussed, especially in the Jordan frame. We have calculated the six-point scattering amplitudes of the scalar particles in both the Jordan frame and the Einstein frame, and explicitly shown the frame-independence of the results. Since the extended target space with the conformal mode is trivial in the single-field case, the dominant contribution comes from the potential of the scalar field. The results in both frames become trivial in the vanishing self-coupling limit as expected.

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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