Exponential quintessence with momentum coupling to dark matter

Abstract

We present updated constraints on an interacting dark energy - dark matter model with pure momentum transfer, where dark energy is in the form of a quintessence scalar field with an exponential potential. We run a suite of MCMC analyses using the DESI DR2 BAO measurements, in combination with CMB data from Planck and supernovae data from DESY5. In contrast to the standard case of uncoupled quintessence, we find that values for the potential's slope parameter $\lambda \ge \sqrt{2}$, which are conjectured by string theory scenarios, are not excluded. If $\lambda$ is fixed to such a value, we find that the data favour the negative coupling branch of the model, which is the branch exhibiting late-time growth suppression. We also derive 95% upper limits on the sum of the neutrino masses, finding $\sum m_{\nu }<0.06$ eV ($\sum m_{\nu }<0.16$ eV) when $\lambda$ is fixed (varied). Our results motivate further studies on dynamical dark energy models that obey string theory bounds and can be constrained with cosmological observations.

15 pages, 6 figures, 2 tables, version accepted for publication in JCAP

References in corpus (56)

• Dynamics of dark energy
• Cosmological Imprint of an Energy Component with General Equation of State
• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• Exploring the Expansion History of the Universe
• Accelerating Universes with Scaling Dark Matter
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• Coupled Quintessence
• The Pantheon+ Analysis: Cosmological Constraints
• Dark Energy Constraints from the Cosmic Age and Supernova
• Quintessence and the Rest of the World
• Planck 2018 results. V. CMB power spectra and likelihoods
• DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
• The Pantheon+ Analysis: The Full Dataset and Light-Curve Release
• KiDS-1000 Cosmology: Cosmic shear constraints and comparison between two point statistics
• KiDS-1000 Cosmology: Multi-probe weak gravitational lensing and spectroscopic galaxy clustering constraints
• Planck 2018 results. VIII. Gravitational lensing
• Cobaya: Code for Bayesian Analysis of hierarchical physical models
• Quintessence arising from exponential potentials
• Efficient sampling of fast and slow cosmological parameters
• On the Cosmological Implications of the String Swampland
• Euclid. I. Overview of the Euclid mission
• DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
• Seven hints that early-time new physics alone is not sufficient to solve the Hubble tension
• Interacting dark energy in the early 2020s: a promising solution to the $H_0$ and cosmic shear tensions
• The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters
• NuFit-6.0: Updated global analysis of three-flavor neutrino oscillations
• Trans-Planckian Censorship and the Swampland
• GetDist: a Python package for analysing Monte Carlo samples
• The landscape, the swampland and the era of precision cosmology
• CMB power spectra and cosmological parameters from Planck PR4 with CamSpec
• Reconciling CMB and structure growth measurements with dark energy interactions
• Observational constraints on an interacting dark energy model
• Models of coupled dark matter to dark energy
• Interacting Dark Energy after DESI Baryon Acoustic Oscillation measurements
• Dark Energy in the Swampland
• Assessing observational constraints on dark energy
• On the road to percent accuracy: nonlinear reaction of the matter power spectrum to dark energy and modified gravity
• KiDS-Legacy: Cosmological constraints from cosmic shear with the complete Kilo-Degree Survey
• Constraint on Coupled Dark Energy Models from Observations
• $H_0$ Tension, Swampland Conjectures and the Epoch of Fading Dark Matter
• Scattering of Dark Matter and Dark Energy
• Escaping local minima with derivative-free methods: a numerical investigation
• Swampland Conjectures and Late-Time Cosmology
• Assessing cosmological evidence for non-minimal coupling
• Scalar-field dark energy nonminimally and kinetically coupled to dark matter
• Dimensional Reduction and (Anti) de Sitter Bounds
• Dynamical Dark Energy in light of the DESI DR2 Baryonic Acoustic Oscillations Measurements
• Dark energy beyond quintessence: Constraints from the swampland
• Understanding the suppression of structure formation from dark matter$\unicode{x2013}$dark energy momentum coupling
• Structure formation simulations with momentum exchange: alleviating tensions between high-redshift and low-redshift cosmological probes
• On the road to percent accuracy V: the non-linear power spectrum beyond $\Lambda$CDM with massive neutrinos and baryonic feedback
• Simulating Momentum Exchange in the Dark Sector
• Dark Energy, the Swampland and the Equivalence Principle
• Horndeski in the Swampland
• Examining Quintessence Models with DESI Data
• Interacting dark energy constraints from the full-shape analyses of BOSS DR12 and DES Year 3 measurements

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