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arXiv 1607.00744hep-thgr-qc
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量子场论中的微调问题和洛伦兹不变性:具有物理动量截止的标量费米子模型

Fine-tuning problems in quantum field theory and Lorentz invariance: A scalar-fermion model with a physical momentum cutoff

J. L. Cortes, J. Lopez-Sarrion

摘要:

研究了在量子场论框架下,洛伦兹不变性作为低能近似的一致性。一个标量和费米子场的模型被用来显示如何违反高动量标度的洛伦兹不变性,一个物理截止渲染的量子场论有限,可以兼容的抑制洛伦兹不变性违反在低动量。在一个循环中确定获得这种抑制并在光谱中具有轻标量粒子所需的微调。

英文摘要:

We study the consistency of having Lorentz invariance as a low energy approximation within the quantum field theory framework. A model with a scalar and a fermion field is used to show how a Lorentz invariance violating high momentum scale, a physical cutoff rendering the quantum field theory finite, can be made compatible with a suppression of Lorentz invariance violations at low momenta. The fine tuning required to get this suppression and to have a light scalar particle in the spectrum is determined at one loop.

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