UV Shadows in EFTs: Accidental Symmetries, Robustness and No‐Scale Supergravity

UV Shadows in EFTs: Accidental Symmetries, Robustness and No‐Scale Supergravity
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EFT 中的紫外线阴影:偶然对称性、鲁棒性和无尺度超重力

DOI:
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发表时间:
2020
期刊:
Fortschritte der Physik
影响因子:
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通讯作者:
F. Quevedo
F. Quevedo
中科院分区:
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文献类型:
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作者:
C. Burgess;M. Cicoli;David Ciupke;S. Krippendorf;F. Quevedo

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我们认为偶然近似标度对称性是弱耦合弦真空的可靠预言,并表明它们与超对称性和其他(广义)内部对称性的相互作用是低能四维EFT中普遍存在的无标度超引力现象的基础。我们确定了4种嵌套类型的无标度超引力,并展示了领先的量子校正如何在保持某些无标度性质(包括非超对称平坦方向)的同时打破标度不变性。我们利用这些想法对微扰10维弦真空中的低能4D超引力作用的修正进行了分类,包括体积贡献和膜贡献。我们对α环和弦环中任意定阶的Kähler势的预测与现有的所有计算都是一致的。P形场扮演着两个重要的角色:它们产生了许多(广义的)移位对称;空间填充的4形场教授4D物理有关高维现象的知识,如通量量化。我们认为,这些稳健的对称性论证足以理解寻找经典德西特真空的障碍,并建议如何在UV完全模型中绕过它们。
We argue that accidental approximate scaling symmetries are robust predictions of weakly coupled string vacua, and show that their interplay with supersymmetry and other (generalised) internal symmetries underlies the ubiquitous appearance of no‐scale supergravities in low‐energy 4D EFTs. We identify 4 nested types of no‐scale supergravities, and show how leading quantum corrections can break scale invariance while preserving some no‐scale properties (including non‐supersymmetric flat directions). We use these ideas to classify corrections to the low‐energy 4D supergravity action in perturbative 10D string vacua, including both bulk and brane contributions. Our prediction for the Kähler potential at any fixed order in α′ and string loops agrees with all extant calculations. p‐form fields play two important roles: they spawn many (generalised) shift symmetries; and space‐filling 4‐forms teach 4D physics about higher‐dimensional phenomena like flux quantisation. We argue that these robust symmetry arguments suffice to understand obstructions to finding classical de Sitter vacua, and suggest how to get around them in UV complete models.
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