Large-scale structure and integrated Sachs-Wolfe effect in decaying vacuum cosmology

The concordance particle creation model - a class of Lambda(t) Cold Dark Matter (CDM) cosmologies - is studied using large-scale structure (LSS) formation, with particular attention to the integrated Sachs-Wolfe effect. The evolution of the gravitational potential and the amplitude of the cross-correlation of the cosmic microwave background (CMB) signal with LSS surveys are calculated in detail. We properly include in our analysis the peculiarities involving the baryonic dynamics of the Lambda(t)CDM model which were not included in previous works. Although both the Lambda(t)CDM and the standard cosmology are in agreement with available data for the CMB-LSS correlation, the former presents a slightly higher signal which can be identified with future data.