Do We Live in the Swampland?

Abstract

A low-energy effective theory is said to be in the swampland if it does not have any consistent UV completion inside a theory of quantum gravity. The natural question is if the standard model of particle physics, possibly with some minimal extensions, are in the swampland or not. We discuss this question in view of the recent swampland conjectures. We prove a no-go theorem concerning the modification of the Higgs sector. Moreover, we find that QCD axion is incompatible with the recent swampland conjectures, unless some sophisticated possibilities are considered. We discuss the implications of this result for spontaneous breaking of CP symmetry. We comment on dynamical supersymmetry breaking as well as the issue of multi-valuedness of the potential.

arXiv comment31 pages, 1 figure

References in corpus (63)

• Cosmology and the Fate of Dilatation Symmetry
• Quintessence, Cosmic Coincidence, and the Cosmological Constant
• Axions In String Theory
• The String Landscape, Black Holes and Gravity as the Weakest Force
• On the Geometry of the String Landscape and the Swampland
• Supergravity description of field theories on curved manifolds and a no go theorem
• Gravity Waves and Linear Inflation from Axion Monodromy
• The QCD axion, precisely
• Quintessence: A Review
• Planck-Scale Physics and the Peccei-Quinn Mechanism
• On the Cosmological Implications of the String Swampland
• Completing Natural Inflation
• Dynamical SUSY Breaking in Meta-Stable Vacua
• N-flation
• Assisted inflation
• Torsion-balance tests of the weak equivalence principle
• What if string theory has no de Sitter vacua?
• Infinite Distances in Field Space and Massless Towers of States
• Theta Dependence In The Large N Limit Of Four-Dimensional Gauge Theories
• Wormholes, Emergent Gauge Fields, and the Weak Gravity Conjecture
• Dynamical Supersymmetry Breaking in Vector-like Gauge Theories
• Tensionless Strings and the Weak Gravity Conjecture
• Dynamical Supersymmetry Breaking on Quantum Moduli Spaces
• Naturalness and the Weak Gravity Conjecture
• An Ignoble Approach to Large Field Inflation
• Evidence for a Lattice Weak Gravity Conjecture
• On the de Sitter swampland criterion
• Strong CP problem and mirror world: the Weinberg Wilczek axion revisited
• Transplanckian axions !?
• Inflationary Constraints on Type IIA String Theory
• Grand unification and heavy axion
• Generalized Assisted Inflation
• Emergence and the Swampland Conjectures
• Sharpening the Weak Gravity Conjecture with Dimensional Reduction
• The Weak Gravity Conjecture in three dimensions
• Anomalous solutions to the strong CP problem
• A New Perspective on Cosmic Coincidence Problems
• Gauge Mediation Simplified
• The dS swampland conjecture and the Higgs potential
• A Model of Visible QCD Axion
• Weak Gravity Strongly Constrains Large-Field Axion Inflation
• Supersymmetry Breaking by Fluxes
• Of CP and other Gauge Symmetries in String Theory
• On Classical de Sitter Vacua in String Theory
• Constraints on Axion Inflation from the Weak Gravity Conjecture
• Is CP a Gauge Symmetry?
• M-theory and Type IIA Flux Compactifications
• Simple Scheme for Gauge Mediation
• Axion monodromy in a model of holographic gluodynamics
• From 4d Yang-Mills to 2d ${\mathbb{CP}}^{N-1}$ model: IR problem and confinement at weak coupling
• The de Sitter swampland conjecture and supersymmetric AdS vacua
• de Sitter extrema and the swampland
• Theta dependence of the vacuum energy in the SU(3) gauge theory from the lattice
• Pure Natural Inflation
• Spontaneous $CP$ breaking in QCD and the axion potential: an effective Lagrangian approach
• A Monodromy from London
• Supersymmetric embedding of antibrane polarization
• Notes on natural inflation
• Monodromy Inflation in SUSY QCD
• Instanton Effects in Three Flavor QCD
• Vacuum structure of Yang-Mills theory as a function of $\theta$
• Tensor Modes in Pure Natural Inflation
• Hermitian Flavor Violation

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• Graduated dark energy: Observational hints of a spontaneous sign switch in the cosmological constant
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• Rescaled Einstein-Hilbert Gravity from $f(R)$ Gravity: Inflation, Dark Energy and the Swampland Criteria
• A Holographic Derivation of the Weak Gravity Conjecture
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• Runaway Quintessence, Out of the Swampland
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• Weakly Coupled de Sitter Vacua with Fluxes and the Swampland
• A Strong Scalar Weak Gravity Conjecture and Some Implications
• Type I Hilltop Inflation and the Refined Swampland Criteria
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• Scaling limits of dS vacua and the swampland
• Phenomenological Consequences of the Refined Swampland Conjecture
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• Quantum aspects of chaos and complexity from bouncing cosmology: A study with two-mode single field squeezed state formalism
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• Minimal gauge inflation and the refined Swampland conjecture
• Pleasant behavior of swampland conjectures in the face of specific inflationary models
• Hyperbolic field space and swampland conjecture for DBI scalar
• What does Inflation say about Dark Energy given the Swampland Conjectures?
• Reheating in small-field inflation on the brane: The Swampland Criteria and observational constraints in light of the PLANCK 2018 results
• Cosmological implications of an interacting model of dark matter \& dark energy
• Multi-field Inflation in High-Slope Potentials
• Inflationary Dynamics and Swampland Criteria for Modified Gauss-Bonnet Gravity Compatible with GW170817
• Eternal Inflation, Entropy Bounds and the Swampland
• Relating the scalar weak gravity conjecture and the swampland distance conjecture for an accelerating universe
• Revisiting the Scalar Weak Gravity Conjecture
• de Sitter Space as a Glauber-Sudarshan State
• Swampland Conjecture and Inflation Model from Brane Perspective
• Strongly Coupled Quintessence
• Reheating Constraints on Inflaton, Dark Matter: Swampland Conjecture
• On uplifts by warped anti-D3-branes
• Racetrack Potentials and the de Sitter Swampland Conjectures
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• Rigid nongeometric orientifolds and the swampland
• Is Trans-Planckian Censorship a Swampland Conjecture?
• $T$-dualizing the de-Sitter no-go scenarios
• Two-field Cosmological $\alpha$-attractors with Noether Symmetry
• Inflation, Swampland, and Landscape
• Rescaled Einstein-Hilbert Gravity: Inflation and the Swampland Criteria
• Catalytic Creation of Baby Bubble Universe with Small Positive Cosmological Constant
• On stable type IIA de-Sitter vacua with geometric flux
• Swampland Criteria and Constraints on Inflation in a $f(R,T)$ Gravity Theory
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• Catalytic Creation of Bubble Universe Induced by Quintessence in Five Dimensions
• Finite temperature effects in modular cosmology
• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
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• The string theory swampland in the Euclid, SKA and Vera Rubin observatory era
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• Constraining Spatial Curvature with Priors from Swampland Conjectures
• Systematic exploration of the non-geometric flux landscape
• On the Occurrence of Finite-time Singularities in Swampland-related Quintessence Dark Energy Models