Decay of the vacuum energy into CMB photons

Abstract

We examine the possibility of the decay of the vacuum energy into cosmic microwave background (CMB) photons. It is shown that observations of the primordial density fluctuation spectrum put strong limits on the possible decay rate. When photon creation due to the vacuum energy decay takes place, the standard linear temperature dependence, T(z)=T_0(1+z), where T_0 is the present CMB temperature, is modified. The decay is described by a generic temperature dependence, T(z)=T_0(1+z)^{1-β}, of the CMB photons. A strong limit on the maximum value of the decay rate is obtained by placing a maximum value on the βparameter: β_{max}\approx 3\times 10^{-3}.

References in corpus (15)

• The Cosmological Constant and Dark Energy
• Supernova Limits on the Cosmic Equation of State
• Parameter constraints for flat cosmologies from CMB and 2dFGRS power spectra
• On the scaling behavior of the cosmological constant and the possible existence of new forces and new light degrees of freedom
• Dark Matter and Background Light
• The 2dF Galaxy Redshift Survey: The amplitudes of fluctuations in the 2dFGRS and the CMB, and implications for galaxy biasing
• Variable Cosmological Constant as a Planck Scale Effect
• Decaying Vacuum Energy and Deflationary Cosmology in Open and Closed Universes
• Cosmological constant, renormalization group and Planck scale physics
• Nucleosynthesis bounds on a time-varying cosmological 'constant'
• Studying the decay of the vacuum energy with the observed density fluctuation spectrum
• Casimir energy in multiply connected static hyperbolic Universes
• Geometrical Constraints on the Cosmological Constant
• Angular Diameters as a Probe of a Cosmological Constant and $\Omega$
• Casimir energy in a small volume multiply connected static hyperbolic pre-inflationary Universe

Cited by in corpus (13)

• Planck 2015 results. XIII. Cosmological parameters
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• Redshift Dependence of the CMB Temperature from S-Z Measurements
• Density Perturbations for Running Cosmological Constant
• Tests of the CMB temperature-redshift relation, CMB spectral distortions and why adiabatic photon production is hard
• Black Hole Formation with an Interacting Vacuum Energy Density
• Cosmological models with Gurzadyan-Xue dark energy
• Phenomenological Dark Energy model with hybrid dynamic Cosmological Constant
• Primordial universe with the running cosmological constant
• Constraints on running vacuum models with the baryon-to-photon ratio
• Dynamics of perturbations in Gurzadyan-Xue cosmological models
• On the correspondence between energy conservation and energy-momentum tensor conservation in cosmology