Observational constraints on decaying vacuum dark energy model
Abstract
The decaying vacuum model (DV), treating dark energy as a varying vacuum, has been studied well recently. The vacuum energy decays linearly with the Hubble parameter in the late-times, (t) H(t), and produces the additional matter component. We constrain the parameters of the DV model using the recent data-sets from supernovae, gamma-ray bursts, baryon acoustic oscillations, CMB, the Hubble rate and x-rays in galaxy clusters. It is found that the best fit of matter density contrast m in the DV model is much lager than that in model. We give the confidence contours in the m-h plane up to 3σ confidence level. Besides, the normalized likelihoods of m and h are presented, respectively. %
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