Constraints on running vacuum models with the baryon-to-photon ratio

Abstract

We study the influence of running vacuum on the baryon-to-photon ratio in running vacuum models (RVMs). When there exists a non-minimal coupling between photons and other matter in the expanding universe, the energy-momentum tensor of photons is no longer conserved, but the energy of photons could remain conserved. We discuss the conditions for the energy conservation of photons in RVMs. The photon number density and baryon number density, from the epoch of photon decoupling to the present day, are obtained in the context of RVMs by assuming that photons and baryons can be coupled to running vacuum, respectively. Both cases lead to a time-evolving baryon-to-photon ratio. However the evolution of the baryon-to-photon ratio is strictly constrained by observations. It is found that if the dynamic term of running vacuum is indeed coupled to photons or baryons, the coefficient of the dynamic term must be extremely small, which is unnatural. Therefore, our study basically rules out the possibility that running vacuum is coupled to photons or baryons in RVMs.

arXiv comment25 pages, 3 figures, 5 tables, minor correction, references added

References in corpus (73)

• The Cosmological Constant and Dark Energy
• Big Bang Nucleosynthesis: 2015
• Cosmic Microwave Background Anisotropies
• Primordial Nucleosynthesis in the Precision Cosmology Era
• The Cosmic Energy Inventory
• Big Bang nucleosynthesis and physics beyond the Standard Model
• Cosmological-Parameter Determination with Microwave Background Maps
• The Primordial Lithium Problem
• Particle decays during the cosmic dark ages
• Big-Bang Nucleosynthesis and the Baryon Density of the Universe
• The cosmological baryon density from the deuterium to hydrogen ratio towards QSO absorption systems: D/H towards Q1243+3047
• Big-Bang Nucleosynthesis After Planck
• Detecting Dark Matter Annihilation with CMB Polarization : Signatures and Experimental Prospects
• Cosmological constant and vacuum energy: old and new ideas
• A Bitter Pill: The Primordial Lithium Problem Worsens
• CMB constraints on Dark Matter models with large annihilation cross-section
• Cosmological dark matter annihilations into gamma-rays - a closer look
• Thermodynamic interpretation of the generalized gravity models with geometry - matter coupling
• On the possible running of the cosmological "constant"
• The scaling evolution of cosmological constant
• Searching for dark matter and variation of fundamental constants with laser and maser interferometry
• Toward Understanding CMB Anisotropies and Their Implications
• Dynamical vacuum energy, holographic quintom, and the reconstruction of scalar-field dark energy
• A New Nucleosynthesis Constraint on the Variation of G
• Updated CMB constraints on Dark Matter annihilation cross-sections
• Review of Big Bang Nucleosynthesis and Primordial Abundances
• Gravitational induced particle production through a nonminimal curvature-matter coupling
• The $H_0$ tension in light of vacuum dynamics in the Universe
• Dark energy: a quantum fossil from the inflationary Universe?
• Expansion History with Decaying Vacuum: A Complete Cosmological Scenario
• Anisotropy of the cosmic gamma-ray background from dark matter annihilation
• Possible signals of vacuum dynamics in the Universe
• Dynamical vacuum energy in the expanding Universe confronted with observations: a dedicated study
• Complete Cosmic History with a dynamical Lambda(H) term
• Nucleosynthesis and the Time Dependence of Fundamental Couplings
• Running vacuum against the $H_0$ and ${\sigma }_8$ tensions
• Measuring Cosmological Parameters with Cosmic Microwave Background Experiments
• The $\bar{\Lambda }CDM$ cosmology: from inflation to dark energy through running $\Lambda$
• Gamma-Rays from Decaying Dark Matter
• Improved BBN Constraints on the Variation of the Gravitational Constant
• Time-varying coupling strengths, nuclear forces and unification
• Interacting dark matter and modified holographic Ricci dark energy induce a relaxed Chaplygin gas
• Cosmologies with a time dependent vacuum
• Running vacuum in quantum field theory in curved spacetime: renormalizing ${\rho }_{vac}$ without $\sim m^4$ terms
• Testing models of vacuum energy interacting with cold dark matter
• Constraints on the Variation of G from Primordial Nucleosynthesis
• Cosmological constant, renormalization group and Planck scale physics
• Can dark energy be expressed as a power series of the Hubble parameter?
• Relaxing the ${\sigma }_8$-tension through running vacuum in the Universe
• Nucleosynthesis bounds on a time-varying cosmological 'constant'
• Dynamical Vacuum in Quantum Cosmology
• Matter Non-conservation in the Universe and Dynamical Dark Energy
• Cosmological bounds on dark matter-photon coupling
• Studying the decay of the vacuum energy with the observed density fluctuation spectrum
• Running vacuum in the Universe and the time variation of the fundamental constants of Nature
• Thermodynamical aspects of running vacuum models
• Interacting dark sector with variable vacuum energy
• Introduction to Big Bang Nucleosynthesis and Modern Cosmology
• Cosmologies with Photon Creation and the 3K Relic Radiation Spectrum
• Threshold Corrections to Dimension-six Proton Decay Operators in Non-minimal SUSY SU(5) GUTs
• Does the second law hold at cosmic scales?
• Decay of the vacuum energy into CMB photons
• Gravitational Baryogenesis in Running Vacuum models
• Big-bang nucleosynthesis in Brans-Dicke cosmology with a varying $\Lambda$ term related to WMAP
• Big Bang Nucleosynthesis Constraints on Universal Extra Dimensions and Varying Fundamental Constants
• Varying physical constants and the lithium problem
• Constraining Density Fluctuations with Big Bang Nucleosynthesis in the Era of Precision Cosmology
• Running Vacuum Cosmological Models: Linear Scalar Perturbations
• Primordial nucleosynthesis with varying fundamental constants: Degeneracies with cosmological parameters
• Constraints on Dark Matter-Photon Coupling in the Presence of Time-Varying Dark Energy
• Running vacuum model in non-flat universe
• Strong limits on the possible decay of the vacuum energy into CDM or CMB photons
• Variation of the baryon-to-photon ratio due to decay of dark matter particles

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