量子放大镜下的霍恩代斯基
Horndeski under the quantum loupe
摘要：
随着最近对引力波传播速度的限制，标量-张量理论的种类已经大大减少。我们认为幸存的模型仍然与宇宙学有关，并研究其辐射稳定性。该模型包含运营商明确打破伽利略对称性，我们研究他们是否损害重组的有效场论。在该制度的有效性，我们建立了一个非重整化定理，并明确表明，量子校正，一个循环，不失谐的经典拉格朗日产生抑制的反项。这是惊人的，因为非重整化定理是建立在一个真正的伽利略对称性破缺项的存在。
英文摘要：
With recent constraints on the propagation speed of gravitational waves, the class of scalar-tensor theories has significantly been reduced. We consider one of the surviving models still relevant for cosmology and investigate its radiative stability. The model contains operators with explicit breaking of the Galileon symmetry and we study whether they harm the re-organization of the effective field theory. Within the regime of validity we establish a non-renormalization theorem and show explicitly that the quantum corrections, to one-loop, do not detune the classical Lagrangian generating suppressed counterterms. This is striking since the non-renormalization theorem is established in the presence of a genuine Galileon symmetry breaking term.
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