期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 1, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP01(2016)101
关键词
Models of Quantum Gravity; Conformal and W Symmetry; Space-Time Symmetries; Gauge-gravity correspondence
资金
- National Science Foundation [NSF PHY11-25915]
- Aspen Center for Physics (NSF) [1066293]
- European Research Council (ERC STG) [279617]
- Cambridge Overseas Trust
- William Georgetti Scholarship
- STFC [ST/L000636/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [1352267] Funding Source: researchfish
- Science and Technology Facilities Council [ST/L000636/1] Funding Source: researchfish
In this paper, we explore a novel observational signature of gravitational corrections during slow-roll inflation. We study the coupling of the inflaton field to higher curvature tensors in models with a minimal breaking of conformal symmetry. In that case, the most general correction to the tensor two-point function is captured by a coupling to the square of the Weyl tensor. We show that these scenarios lead to a correction to the tilt of the tensor power spectrum and hence a violation of the tensor consistency condition. We arrive at the same conclusion through an analysis in conformal perturbation theory.
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