Density Perturbations for Running Cosmological Constant

  title={Density Perturbations for Running Cosmological Constant},
  author={J{\'u}lio C{\'e}sar Fabris and Ilya L. Shapiro and Joan Sol{\`a}},
The dynamics of density and metric perturbations is investigated for the previously developed model where the decay of the vacuum energy into matter (or vice versa) is due to the renormalization group running of the cosmological constant term (CC). The dynamics of the CC depends on the single parameter ν which characterizes the running of the CC produced by the mass spectrum of the unknown high energy theory below the Planck scale. The sign of ν indicates whether bosons or fermions dominate in… CONTINUE READING