# Constraints on single-field inflation

@article{Pirtskhalava2015ConstraintsOS, title={Constraints on single-field inflation}, author={David Pirtskhalava and Luca Santoni and Enrico Trincherini}, journal={Journal of Cosmology and Astroparticle Physics}, year={2015}, volume={2016}, pages={051 - 051} }

Many alternatives to canonical slow-roll inflation have been proposed over the years, one of the main motivations being to have a model, capable of generating observable values of non-Gaussianity. In this work, we (re-)explore the physical implications of a great majority of such models within a single, effective field theory framework (including novel models with large non-Gaussianity discussed for the first time below). The constraints we apply—both theoretical and experimental—are found to…

## 9 Citations

### F eb 2 01 8 The Effective Theory of Shift-Symmetric Cosmologies

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A shift symmetry is a ubiquitous ingredient in inflationary models, both in effective constructions and in UV-finite embeddings such as string theory. It has also been proposed to play a key role in…

### The effective theory of shift-symmetric cosmologies

- Physics
- 2018

A shift symmetry is a ubiquitous ingredient in inflationary models, both in effective constructions and in UV-finite embeddings such as string theory. It has also been proposed to play a key role in…

### Large non-gaussianity in slow-roll inflation

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A bstractCanonical models of single-field, slow-roll inflation do not lead to appreciable non-Gaussianity, unless derivative interactions of the inflaton become uncontrollably large. We propose a…

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- PhysicsJournal of High Energy Physics
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We study the generation of a large power spectrum, necessary for primordial black hole formation, within the effective theory of single-field inflation. The mechanisms we consider include a…

### Large power spectrum and primordial black holes in the effective theory of inflation

- PhysicsJournal of High Energy Physics
- 2022

We study the generation of a large power spectrum, necessary for primordial black hole formation, within the effective theory of single-field inflation. The mechanisms we consider include a…

### Behind Horndeski: structurally robust higher derivative EFTs

- PhysicsJournal of High Energy Physics
- 2018

Higher derivative scalar interactions can give rise to interesting cosmological scenarios. We present a complete classification of such operators that can yield sizeable effects without introducing…

### Tachyon inflation in an AdS braneworld with backreaction

- Physics
- 2017

We analyze the inflationary scenario based on the tachyon field coupled with the radion of the second Randall–Sundrum model (RSII). The tachyon Lagrangian is derived from the dynamics of a 3-brane…

### Behind Horndeski: structurally robust higher derivative EFTs

- PhysicsJournal of High Energy Physics
- 2018

A bstractHigher derivative scalar interactions can give rise to interesting cosmological scenarios. We present a complete classification of such operators that can yield sizeable effects without…

### Gaugid inflation

- Physics
- 2017

The spectrum of primordial gravitational waves is one of the most robust inflationary observables, often thought of as a direct probe of the energy scale of inflation. We present a simple model,…

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