Beyond Positivity Bounds and the Fate of Massive Gravity.
Beyond Positivity Bounds and the Fate of Massive Gravity.
复制标题
超越积极性界限和大重力的命运。
DOI：
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发表时间：
2017
影响因子：
8.6
通讯作者：
F. Sgarlata
中科院分区：
文献类型：
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作者：
B. Bellazzini;F. Riva;J. Serra;F. Sgarlata
我们通过超越由散射振幅的幺正性、解析性和交叉对称性得出的熟悉的正性界限来限制有效场论。作为有趣的例子，我们讨论了伽利略和无幽灵大引力的界限的含义。我们的理论界限与引力子质量的实验约束相结合意味着后者要么被排除，要么无法描述引力现象，更不用说一致地实施凡施泰因机制，一直到第五力实验的相关尺度，广义相对论已经在这些实验中得到了成功的测试。我们还表明，伽利略理论必须包含对称破缺项，与对称性保持项相比，这些项最多被抑制一环。我们还评论了我们边界的其他有趣的应用。
We constrain effective field theories by going beyond the familiar positivity bounds that follow from unitarity, analyticity, and crossing symmetry of the scattering amplitudes. As interesting examples, we discuss the implications of the bounds for the Galileon and ghost-free massive gravity. The combination of our theoretical bounds with the experimental constraints on the graviton mass implies that the latter is either ruled out or unable to describe gravitational phenomena, let alone to consistently implement the Vainshtein mechanism, down to the relevant scales of fifth-force experiments, where general relativity has been successfully tested. We also show that the Galileon theory must contain symmetry-breaking terms that are at most one-loop suppressed compared to the symmetry-preserving ones. We comment as well on other interesting applications of our bounds.
影响因子：
5
作者：
Xián O. Camanho;Gustavo Lucena Gómez;Rakibur Rahman
通讯作者：
Rakibur Rahman