Testing the nature of Dark Energy with Precision Cosmological constraints

Abstract

We present a Dark Energy (DE) model with a sound derivation as a natural extension of the Standard Model of particle physics with no free parameters and an excellent fit with current cosmological data improving by 21% the $\Lambda$CDM fit of the Baryon Acoustic Oscillations (BAO) measurements, specially designed to determine the dynamics of DE. DE corresponds to the lightest bound state scalar particle $\varphi$ with a potential $V={\Lambda }_c^{4+2/3}{\varphi }^{-2/3}$ dynamically formed at the condensation energy scale ${\Lambda }_c$ and scale factor $a_c$. The value of ${\Lambda }_c$, the exponent $n=2/3$, and the initial conditions of $\varphi$ are all derived quantities. We obtain an exact constraint $a_c{\Lambda }_c/\text{eV}=1.0939\times 10^{-4}$ and a theoretical prediction ${\Lambda }_c=34_{-11}^{+16}\text{ eV}$, consistent with the best fit ${\Lambda }_c=44.08\pm 0.27\text{ eV}$. We test our model constraint on $a_c{\Lambda }_c$ by allowing $a_c$ and ${\Lambda }_c$ to vary independently and remarkably our prediction has a relative difference of only 0.2% with the best fit value. Unlike a cosmological constant $\Lambda$, our DE model predicts the amount of DE and leaves detectable cosmological imprints at different times and scales at a background and perturbation level.

7 pages, 5 figures

References in corpus (11)

• Dynamics of dark energy
• Cosmology and the Fate of Dilatation Symmetry
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Primordial Nucleosynthesis: from precision cosmology to fundamental physics
• Constraints on dark energy dynamics and spatial curvature from Hubble parameter and baryon acoustic oscillation data
• Limits on Dark Radiation, Early Dark Energy, and Relativistic Degrees of Freedom
• A robust deuterium abundance; Re-measurement of the z=3.256 absorption system towards the quasar PKS1937-1009
• Cosmological constant vis-a-vis dynamical vacuum: bold challenging the $\Lambda$CDM
• Cosmological constraints from the redshift dependence of the Alcock-Paczynski effect: Dynamical dark energy
• New tracker models of dark energy

Cited by in corpus (9)

• Towards a Solution to the H0 Tension: the Price to Pay
• Bound Dark Energy: towards understanding the nature of the Dark Energy
• Nonlinear structure formation in Bound Dark Energy
• Impact of cosmological signatures in two-point statistics beyond the linear regime
• Signatures of Very Early Dark Energy in the Matter Power Spectrum
• Cosmological signatures of a Rapid Diluted Energy Density
• Testing bound dark energy with cosmological parameter and fundamental constant evolution
• Impact of a Rapid Diluted Energy Density on the halo mass function
• Spectral distortions in the decaying QCD dark matter scenario