Primordial non-Gaussianity from ultra slow-roll Galileon inflation

Abstract

We present a detailed study of the generation of large primordial non-Gaussianities during the slow-roll (SR) to ultra-slow roll (USR) transitions in the framework of Galileon inflation. We found out that due to having sharp transitions in the USR phase, which persist with a duration of $\Delta N_{\mathrm{USR}}\sim 2$ e-folds, we are able to generate the non-Gaussianity amplitude of the order: $|f_{\mathrm{NL}}|\sim O(10^{-2})$ in the SRI, $-5<f_{\mathrm{NL}}<5$ in the USR, and $-2<f_{\mathrm{NL}}<2$ in the SRII phases. As a result, we are able to achieve a cumulative average value of $|f_{\mathrm{NL}}|\sim O(1)$. This implies that our results strictly satisfy Maldacena's no-go theorem in the squeezed limit only for SRI, while they strictly violate the same condition in both the USR and SRII phases. The non-renormalization theorem in the Galileon theory helps to support our results regarding the generation of large mass primordial black holes along with large non-Gaussianities, which we show to be dependent on the specific positions of the transition wave numbers fixed at low scales.

arXiv comment51 pages, 11 figures, 1 table, Typos corrected, and new references added, Comments are welcome, Revised version accepted for publication in JCAP

References in corpus (189)

• Modified Gravity and Cosmology
• Non-Gaussian features of primordial fluctuations in single field inflationary models
• k-Inflation
• The galileon as a local modification of gravity
• The NANOGrav 15-year Data Set: Evidence for a Gravitational-Wave Background
• Generalized G-inflation: Inflation with the most general second-order field equations
• New cosmological constraints on primordial black holes
• Perturbations in k-inflation
• The Effective Field Theory of Inflation
• Covariant Galileon
• DBI in the Sky
• Observational Signatures and Non-Gaussianities of General Single Field Inflation
• Dark Energy
• Cosmological Tests of Modified Gravity
• Imperfect Dark Energy from Kinetic Gravity Braiding
• Primordial Non-Gaussianities from Inflation Models
• Primordial Black Holes
• Effective Field Theory for Inflation
• Quasi-Single Field Inflation and Non-Gaussianities
• G-inflation: inflation driven by the Galileon field
• The Effective Field Theory of Dark Energy
• The shape of non-Gaussianities
• Testing General Relativity in Cosmology
• Steepest growth of the power spectrum and primordial black holes
• Large Non-Gaussianities in Single Field Inflation
• Ultra Slow-Roll Inflation and the non-Gaussianity Consistency Relation
• Galilean Genesis: an alternative to inflation
• Large non-Gaussianities with Intermediate Shapes from Quasi-Single Field Inflation
• Cosmological Tests of Gravity
• Cosmology of a covariant Galileon field
• Generation and Characterization of Large Non-Gaussianities in Single Field Inflation
• Assisted inflation via tachyon condensation
• Violation of non-Gaussianity consistency relation in a single field inflationary model
• Primordial Black Hole production in Critical Higgs Inflation
• Single Field Double Inflation and Primordial Black Holes
• Scalaron from $R^2$-gravity as a Heavy Field
• Galileon inflation
• Conditions for the cosmological viability of the most general scalar-tensor theories and their applications to extended Galileon dark energy models
• Effective gravitational couplings for cosmological perturbations in the most general scalar-tensor theories with second-order field equations
• The Formation of Primary Galactic Nuclei during Phase Transitions in the Early Universe
• Multi-field galileons and higher co-dimension branes
• The recent gravitational wave observation by pulsar timing arrays and primordial black holes: the importance of non-gaussianities
• Primordial Black Hole Formation in a Double Inflation Model in Supergravity
• Chaotic new inflation and formation of primordial black holes
• Clusters of primordial black holes
• Primordial Black Holes from $\alpha$-attractors
• The Imperfect Fluid behind Kinetic Gravity Braiding
• Cosmology of the Galileon from Massive Gravity
• Primordial Structure of Massive Black Hole Clusters
• Primordial Black Holes from a tiny bump/dip in the Inflaton potential
• Bouncing Galileon Cosmologies
• Vainshtein screening in a cosmological background in the most general second-order scalar-tensor theory
• Quasi-Single Field Inflation with Large Mass
• The exponential tail of inflationary fluctuations: consequences for primordial black holes
• Generalized Galileon cosmology
• Random Matrices and the Spectrum of N-flation
• Inflationary non-Gaussianities in the most general second-order scalar-tensor theories
• Higgs G-inflation
• Primordial Black Holes from Polynomial Potentials in Single Field Inflation
• A formal introduction to Horndeski and Galileon theories and their generalizations
• Galileon gravity and its relevance to late time cosmic acceleration
• Inflation and Primordial Black Holes
• The recovery of General Relativity in massive gravity via the Vainshtein mechanism
• On the Cosmological Relevance of the Tachyon
• A Single Field Inflation Model with Large Local Non-Gaussianity
• Mechanisms for Primordial Black Hole Production in String Theory
• Primordial Black Holes from Inflation with Nonminimal Derivative Coupling
• Observational constraints on Galileon cosmology
• Primordial black holes from the preheating instability
• Inflation and primordial non-Gaussianities of "generalized Galileons"
• Primordial non-gaussianity up to all orders: theoretical aspects and implications for primordial black hole models
• Galileons from Lovelock actions
• Primordial non-Gaussianity from the DBI Galileons
• Primordial Black Holes from String Inflation
• Single-field inflation, anomalous enhancement of superhorizon fluctuations, and non-Gaussianity in primordial black hole formation
• Matter perturbations in Galileon cosmology
• Revisiting non-Gaussianity from non-attractor inflation models
• Density perturbations in general modified gravitational theories
• Modified gravity a la Galileon: Late time cosmic acceleration and observational constraints
• Anatomy of single-field inflationary models for primordial black holes
• Galileons as Wess-Zumino Terms
• Primordial non-Gaussianities in general modified gravitational models of inflation
• Running-Mass Inflation Model and Primordial Black Holes
• Cosmic expansion and growth histories in Galileon scalar-tensor models of dark energy
• Linear perturbations in Galileon gravity models
• Constraints on Shift-Symmetric Scalar-Tensor Theories with a Vainshtein Mechanism from Bounds on the Time Variation of G
• The Paths of Gravity in Galileon Cosmology
• Galileons in the Sky
• Black hole formation from a general quadratic action for inflationary primordial fluctuations
• de Sitter Galileon
• Primordial blackholes and gravitational waves for an inflection-point model of inflation
• PBH formation in EFT of single field inflation with sharp transition
• Simulating the quartic Galileon gravity model on adaptively refined meshes
• Vainshtein mechanism in second-order scalar-tensor theories
• Running Spectral Index and Formation of Primordial Black Hole in Single Field Inflation Models
• Generalizing Galileons
• Primordial non-Gaussianity from G-inflation
• Large slow-roll corrections to the bispectrum of noncanonical inflation
• Quantum loop effects on the power spectrum and constraints on primordial black holes
• Generalized Brans-Dicke theories
• In-in and $\delta N$ calculations of the bispectrum from non-attractor single-field inflation
• Supersymmetric Galileons
• Revisiting fifth forces in the Galileon model
• The parameter space in Galileon gravity models
• EFT Compatible PBHs: Effective Spawning of the Seeds for Primordial Black Holes during Inflation
• Primordial Black Hole Production in Inflationary Models of Supergravity with a Single Chiral Superfield
• Galileon inflation evades the no-go for PBH formation in the single-field framework
• A Galileon Design of Slow Expansion
• Laboratory Tests of the Galileon
• Inflation: Theory and Observations
• Primordial Black Hole Formation in Supergravity
• No-go for the formation of heavy mass Primordial Black Holes in Single Field Inflation
• δN formalism
• Shapes of primordial non-Gaussianities in the Horndeski's most general scalar-tensor theories
• Primordial fluctuations and non-Gaussianities from multifield DBI Galileon inflation
• Constant roll and primordial black holes
• Theories of Dark Energy with Screening Mechanisms
• Large Scale Structures in Kinetic Gravity Braiding Model That Can Be Unbraided
• Low & High scale MSSM inflation, gravitational waves and constraints from Planck
• Consistently violating the non-Gaussian consistency relation
• Squeezed bispectrum and one-loop corrections in transient constant-roll inflation
• Potential-driven Galileon inflation
• Primordial Black Holes Arise When The Inflaton Falls
• Cosmological constraints on extended Galileon models
• Defrosting in an Emergent Galileon Cosmology
• Primordial black holes from stochastic tunnelling
• Fourth level MSSM inflation from new flat directions
• DBI Galileon inflation in background SUGRA
• Light mass galileons: Cosmological dynamics, mass screening and observational constraints
• Inflation and dark energy arising from geometrical tachyons
• Observational Constraints on Kinetic Gravity Braiding from the Integrated Sachs-Wolfe Effect
• Conserved cosmological perturbation in Galileon models
• Priomordial non-Gaussian features from DBI Galileon inflation
• Brane inflation in background supergravity
• The Primordial Black Hole Formation from Single-Field Inflation is Not Ruled Out
• Primordial black holes from metric preheating: mass fraction in the excursion-set approach
• Large Primordial Trispectra in General Single Field Inflation
• Non-minimally Coupled Tachyonic Inflation in Warped String Background
• Dark energy: investigation and modeling
• A Galileon Design of Slow Expansion: II
• Charting an Inflationary Landscape with Random Matrix Theory
• Primordial perturbations from ultra-slow-roll single-field inflation with quantum loop effects
• Primordial Black Holes from No-Scale Supergravity
• Scalar induced gravity waves from ultra slow-roll Galileon inflation
• The Primordial Black Hole Formation from Single-Field Inflation is Still Not Ruled Out
• From Wires to Cosmology
• Inflation is always semi-classical: Diffusion domination overproduces Primordial Black Holes
• Large power spectrum and primordial black holes in the effective theory of inflation
• Primordial black holes formation in the inflationary model with field-dependent kinetic term for quartic and natural potentials
• The Speed of Galileon Gravity
• Mechanisms of Producing Primordial Black Holes By Breaking The SU(2,1)/SU(2)$\times$U(1) Symmetry
• Primordial non-Gaussianity as a saviour for PBH overproduction in SIGWs generated by Pulsar Timing Arrays for Galileon inflation
• Higgs inflation from new Kähler potential
• CMB from EFT
• Constraining $\mathcal{N}=1$ supergravity inflation with non-minimal Kähler operators using $\delta N$ formalism
• Formation of primordial black holes after Starobinsky inflation
• Galileons with Gauge Symmetries
• The δN formula is the dynamical renormalization group
• COSMOS-$e^{\prime }$-GTachyon from String Theory
• Highly asymmetric probability distribution from a finite-width upward step during inflation
• Production of Primordial Black Holes via Single Field Inflation and Observational Constraints
• Evading no-go for PBH formation and production of SIGWs using Multiple Sharp Transitions in EFT of single field inflation
• Les Houches Lectures on Physics Beyond the Standard Model of Cosmology
• Brane inflation: A field theory approach in background supergravity
• Spatially Covariant Theories of a Transverse, Traceless Graviton, Part I: Formalism
• Gauged Galileons From Branes
• Primordial black holes and induced gravitational waves from double-pole inflation
• Goldstone's Theorem and Hamiltonian of Multi-galileon Modified Gravity
• Quantum Out-of-Equilibrium Cosmology
• Primordial black holes and inflation from double-well potentials
• Inflation in Multi-field Modified DBM Potentials
• Orthogonal non-Gaussianities from Dirac-Born-Infeld Galileon inflation
• G-Curvaton
• A non-perturbative test of consistency relations and their violation
• Squeezing $f_{\mathrm{NL}}$ out of the matter bispectrum with consistency relations
• Covariantly Quantum Galileon
• Improved model of primordial black hole formation after Starobinsky inflation
• On the Trispectrum of Galileon Inflation
• Generalized Galileon Model -- cosmological reconstruction and the Vainshtein mechanism --
• Beyond the growth rate of cosmic structure: Testing modified gravity models with an extra degree of freedom
• Inflation with a graceful exit in a random landscape
• Constraining Galileon gravity from observational data with growth rate
• Quantum randomness in the Sky
• Strong Primordial Inhomogeneities and Galaxy Formation
• Untangling PBH overproduction in $w$-SIGWs generated by Pulsar Timing Arrays for MST-EFT of single field inflation
• Large Non-Gaussianity in Slow-Roll Inflation
• Galileogenesis: A new cosmophenomenological zip code for reheating through R-parity violating coupling
• Classical Stability of the Galileon
• Indirect imprints of primordial non-Gaussianity on cosmic microwave background

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• Quantum loop effects on the power spectrum and constraints on primordial black holes
• Galileon inflation evades the no-go for PBH formation in the single-field framework
• Implications of Pulsar Timing Array Data for Scalar-Induced Gravitational Waves and Primordial Black Holes: Primordial Non-Gaussianity $f_{\mathrm{NL}}$ Considered
• Scalar induced gravity waves from ultra slow-roll Galileon inflation
• Primordial regular black holes as all the dark matter. II. Non-time-radial-symmetric and loop quantum gravity-inspired metrics
• Primordial regular black holes as all the dark matter. I. Time-radial-symmetric metrics
• Realisation of the ultra-slow roll phase in Galileon inflation and PBH overproduction
• Complete analysis of the background and anisotropies of scalar-induced gravitational waves: primordial non-Gaussianity $f_{\mathrm{NL}}$ and $g_{\mathrm{NL}}$ considered
• Large fluctuations and Primordial Black Holes
• Obviating PBH overproduction for SIGWs generated by Pulsar Timing Arrays in loop corrected EFT of bounce
• Regularized-Renormalized-Resummed loop corrected power spectrum of non-singular bounce with Primordial Black Hole formation
• Primordial Black Holes and Scalar-induced Gravitational Waves in Radiative Hybrid Inflation
• Untangling PBH overproduction in $w$-SIGWs generated by Pulsar Timing Arrays for MST-EFT of single field inflation
• Angular bispectrum and trispectrum of scalar-induced gravitational waves: all contributions from primordial non-Gaussianity $f_{\mathrm{NL}}$ and $g_{\mathrm{NL}}$
• Mechanisms for producing Primordial Black Holes from Inflationary Models Beyond Fine-Tuning
• Large fluctuations in the Sky
• Primordial Black Holes from Effective Field Theory of Stochastic Single Field Inflation at NNNLO
• Primordial regular black holes as all the dark matter. III. Covariant canonical quantum gravity models
• Primordial black holes in non-minimal Gauss-Bonnet inflation in light of the PTA data
• Scalar induced gravitational waves in chiral scalar-tensor theory of gravity
• Negative non-Gaussianity as a salvager for PBHs with PTAs in bounce
• Dynamical system analysis in modified Galileon cosmology
• Non-Gaussianities and Primordial Black Holes
• Climbing over the potential barrier during inflation via null energy condition violation
• Stochastic origin of primordial fluctuations in the Sky
• Primordial black holes and scalar-induced gravitational waves from the polynomial attractor model
• Enhancement of small-scale induced gravitational waves from the soliton/oscillon domination
• Tadpole Cosmology: Milne Solution as a Cosmological Constant Hideout
• Primordial Black Holes from Spatially Varying Cosmological Constant Induced by Field Fluctuations in Extra Dimensions
• RRR fluctuations from non-singular bounce