Can Dark Matter Decay in Dark Energy?

Abstract

We analyze the interaction between Dark Energy and Dark Matter from a thermodynamical perspective. By assuming they have different temperatures, we study the possibility of occurring a decay from Dark Matter into Dark Energy, characterized by a negative parameter $Q$. We find that, if at least one of the fluids has non vanishing chemical potential, for instance ${\mu }_x<0$ and ${\mu }_{dm}=0$ or ${\mu }_x=0$ and ${\mu }_{dm}>0$, the decay is possible, where ${\mu }_x$ and ${\mu }_{dm}$ are the chemical potentials of Dark Energy and Dark Matter, respectively. Using recent cosmological data, we find that, for a fairly simple interaction, the Dark Matter decay is favored with a probability of $\sim 93$ over the Dark Energy decay. This result comes from a likelihood analysis where only background evolution has been considered.

Matches the published version. Section V changed. Formalism and main conclusion unchanged

References in corpus (41)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
• The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set
• New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
• Improved Cosmological Constraints from New, Old and Combined Supernova Datasets
• Small Scale Cosmological Perturbations: An Analytic Approach
• Holographic dark energy and cosmic coincidence
• Transition of the dark energy equation of state in an interacting holographic dark energy model
• Interacting Quintessence
• Interacting quintessence solution to the coincidence problem
• Cosmic Confusion: Degeneracies among Cosmological Parameters Derived from Measurements of Microwave Background Anisotropies
• Large-scale instability in interacting dark energy and dark matter fluids
• Probing the Coupling between Dark Components of the Universe
• The ESSENCE Supernova Survey: Survey Optimization, Observations, and Supernova Photometry
• Dynamics of dark energy with a coupling to dark matter
• Constraints on the interacting holographic dark energy model
• Super-acceleration as Signature of Dark Sector Interaction
• Le Chatelier-Braun principle in cosmological physics
• Can vacuum decay in our Universe?
• Observational constraints on interacting quintessence models
• Interacting Dark Energy and Dark Matter: observational Constraints from Cosmological Parameters
• Testing the viability of the interacting holographic dark energy model by using combined observational constraints
• Stability of the curvature perturbation in dark sectors' mutual interacting models
• Dark Interactions and Cosmological Fine-Tuning
• Thermodynamical description of the interaction between holographic dark energy and dark matter
• Interpreting Cosmological Vacuum Decay
• Holographic dark energy in Brans-Dicke theory
• Matter density perturbations in interacting quintessence models
• Mass functions in coupled Dark Energy models
• On Phantom Thermodynamics
• Late Universe expansion dominated by domain walls and dissipative dark matter
• New coupled quintessence cosmology
• Chemical Potential and the Nature of the Dark Energy: The case of phantom
• Reacting fluids in the expanding Universe: A new mechanism for entropy production
• Dark energy interacting with neutrinos and dark matter: a phenomenological theory
• Constraints from the Old Quasar APM 08279+5255 on Two Classes of $\Lambda ($t$)$-Cosmologies

Cited by in corpus (47)

• Linear and nonlinear interactions in the dark sector
• Observational constraints on an interacting dark energy model
• Models of coupled dark matter to dark energy
• The Growth of Structure in Interacting Dark Energy Models
• Generalized hybrid metric-Palatini gravity
• The Parameterized Post-Friedmannian Framework for Interacting Dark Energy Theories
• Adiabatic initial conditions for perturbations in interacting dark energy models
• On the Dark Sector Interactions
• Large-scale stable interacting dark energy model: Cosmological perturbations and observational constraints
• Quintessence with quadratic coupling to dark matter
• Dynamics of dark energy models and centre manifolds
• Kinetic k-essence ghost dark energy model
• Effects of quantum fluctuations of metric on the universe
• Distinguishing interacting dark energy from wCDM with CMB, lensing, and baryon acoustic oscillation data
• Interacting model of new agegraphic dark energy: observational constraints and age problem
• A new approach on the stability analysis in ELKO cosmology
• New Interaction between Dark Energy and Dark Matter Changes Sign during Cosmological Evolution
• Analysis of Generalized Ghost Version of Pilgrim Dark Energy
• Cosmology with interaction in the dark sector
• Some remarks on the attractor behaviour in ELKO cosmology
• Interacting Ricci-like holographic dark energy
• On the equivalence of Lambda(t) and gravitationally induced particle production cosmologies
• DESI Dark Energy Time Evolution is Recovered by Cosmologically Coupled Black Holes
• Self-interacting holographic dark energy
• Barrow Holographic Dark Energy Model with GO Cut-off -- An Alternative Perspective
• Crossing the phantom divide line in the Holographic dark energy model in a closed universe
• From Hubble to Snap Parameters: A Gaussian Process Reconstruction
• Positive neutrino masses with DESI DR2 via matter conversion to dark energy
• Gravitational Matter Creation, Multi-fluid Cosmology and Kinetic Theory
• Can dark matter-dark energy interaction alleviate the Cosmic Coincidence Problem?
• Interacting holographic Ricci dark energy as running vacuum
• Interacting holographic dark energy models: A general approach
• Holographic dark energy in Barrow cosmology with Granda-Oliveros IR cutoff
• Determination of the Kinematic Parameters from SNe Ia and Cosmic Chronometers
• Cosmological fluids with boundary term couplings
• A holographic bound on the total number of computations in the visible Universe
• Thermodynamics of diffusive DM/DE systems
• Coincidence problem within dark energy as a coupled self-interacting Bose-Einstein gas
• Thermodynamics of interacting holographic dark energy
• Constructing Viable Interacting Dark Matter and Dark Energy Models: A Dynamical Systems Approach
• Bayesian analysis of running holographic Ricci dark energy
• Agegraphic dark energy with the sign-changeable interaction in non-flat universe
• Hints Beyond $\Lambda$CDM from Barrow and Tsallis Holographic Dark Energy with GO cutoff
• Non-Parametric Analysis for the Dark Matter Density Evolution
• Cosmological Equations for Interacting Energies
• Holographic Ricci DE as running vacuum with nonlinear interactions
• Generalized Semi-Holographic Universe