Quantum corrections in Galileon theories
Quantum corrections in Galileon theories
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伽利略理论中的量子修正
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
O. Zanusso
中科院分区：
文献类型：
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作者：
N. Brouzakis;A. Codello;N. Tetradis;O. Zanusso
利用截断正则化方法，计算了立方伽利略理论中的单圈量子修正。我们确认了单圈有效作用的预期形式，并且伽利略理论的耦合不会被重整化。然而，没有包括在树级作用中的新项是由量子修正引起的。我们还考虑了有效膜理论中的单圈修正，它属于Horndeski或广义伽利略类。我们发现新的项是由量子修正产生的，而树级耦合也是重整化的。我们的结论是，与伽利略理论相比，量子修正对广义伽利略理论结构的改变更为彻底。
We calculate the one-loop quantum corrections in the cubic Galileon theory, by using cutoff regularization. We confirm the expected form of the one-loop effective action and that the couplings of the Galileon theory do not get renormalized. However, new terms, not included in the tree-level action, are induced by quantum corrections. We also consider the one-loop corrections in an effective brane theory, which belongs to the Horndeski or generalized Galileon class. We find that new terms are generated by quantum corrections, while the tree-level couplings are also renormalized. We conclude that the structure of the generalized Galileon theories is altered by quantum corrections more radically than that of the Galileon theory.