Full bispectra from primordial scalar and tensor perturbations in the most general single-field inflation model

Abstract

We compute the full bispectra, namely both auto- and cross- bispectra, of primordial curvature and tensor perturbations in the most general single-field inflation model whose scalar and gravitational equations of motion are of second order. The formulae in the limits of k-inflation and potential-driven inflation are also given. These expressions are useful for estimating the full bispectra of temperature and polarization anisotropies of the cosmic microwave background radiation.

20 pages, 5 figures, accepted to PTEP

Cited by in corpus (8)

• Inflation, Cosmic Perturbations and Non-Gaussianities
• Shapes of primordial non-Gaussianities in the Horndeski's most general scalar-tensor theories
• Evolution of cosmological perturbations and the production of non-Gaussianities through a nonsingular bounce: Indications for a no-go theorem in single field matter bounce cosmologies
• Non-Gaussianity Consistency Relations, Initial States and Back-reaction
• On the scalar consistency relation away from slow roll
• Space-time slicing in Horndeski theories and its implications for non-singular bouncing solutions
• Consistency relation in power law G-inflation
• Numerical evaluation of the tensor bispectrum in two field inflation