Extended effective field theory of inflation

被引：0
作者：
Amjad Ashoorioon
Roberto Casadio
Michele Cicoli
Ghazal Geshnizjani
Hyung J. Kim
机构：
[1] INFN,School of Physics
[2] Sezione di Bologna,Dipartimento di Fisica e Astronomia
[3] Institute for Research in Fundamental Sciences (IPM),Department of Applied Mathematics
[4] Università di Bologna,undefined
[5] Abdus Salam International Centre for Theoretical Physics (ICTP),undefined
[6] University of Waterloo,undefined
[7] Perimeter Institute for Theoretical Physics,undefined
来源：
Journal of High Energy Physics | / 2018卷
关键词：
Effective Field Theories; Cosmology of Theories beyond the SM; Classical Theories of Gravity; Sigma Models;
D O I：
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学科分类号：
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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