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arXiv 1802.03040hep-thastro-ph.COgr-qc
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暴胀的扩展有效场论

Extended Effective Field Theory of Inflation

Amjad Ashoorioon, Roberto Casadio, Michele Cicoli, Ghazal Geshnizjani, Hyung J. Kim

摘要:

我们提出了一个一般的框架,其中的有效场论的单场膨胀是扩展的包含与质量维3和4的运营商在幺正规范。这些高维算子引入四次和六次修正色散关系。我们研究了这种扩展的有效场论的膨胀和这些高维运营商的CMB观测与标量扰动,如声速,功率谱的振幅和张量标量比的效果的有效性。相反,张量扰动保持不变。

英文摘要:

We present a general framework where the effective field theory of single field inflation is extended by the inclusion of operators with mass dimension 3 and 4 in the unitary gauge. These higher dimensional operators introduce quartic and sextic corrections to the dispersion relation. We study the regime of validity of this extended effective field theory of inflation and the effect of these higher dimensional operators on CMB observables associated with scalar perturbations, such as the speed of sound, the amplitude of the power spectrum and the tensor-to-scalar ratio. Tensor perturbations remain instead, unaltered.

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