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arXiv 1507.06017hep-thastro-ph.CO
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尺度的沃德恒等式与暴胀中的特殊共形变换

Ward Identities for Scale and Special Conformal Transformations in Inflation

Nilay Kundu, Ashish Shukla, Sandip P. Trivedi

摘要:

在单场暴胀理论中,我们导出了尺度变换和特殊共形变换的一般沃德恒等式。我们的分析是模型独立的,仅基于对称性的考虑。我们得到的恒等式对慢滚展开中的所有阶都是有效的。对于特殊的共形变换,沃德恒等式包括一个在由于补偿空间重新参数化而产生的场中是非线性的项。一些观测结果进行了讨论。

英文摘要:

We derive the general Ward identities for scale and special conformal transformations in theories of single field inflation. Our analysis is model independent and based on symmetry considerations alone. The identities we obtain are valid to all orders in the slow roll expansion. For special conformal transformations, the Ward identities include a term which is non-linear in the fields that arises due to a compensating spatial reparametrization. Some observational consequences are also discussed.

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