From the 1 of 5 linked papers with an AI index.
5 papers
XCDM: a running vacuum strategy for crossing the phantom divide
Joan Solà Peracaula, Adrià Gómez-Valent, Alex González-Fuentes
The paper introduces the ΛXCDM model, a composite running‑vacuum dark energy scenario that naturally crosses the phantom divide and fits recent supernova, BAO, and CMB data better…
Dynamical Dark Energy models in light of the latest observations
Javier de Cruz Pérez, Adrià Gómez-Valent, Joan Solà Peracaula
In this paper, we study several models and parameterizations of dynamical dark energy (DE) that have been studied already in the past, in conjunction with the recently proposed mod…
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…
Composite running vacuum in the Universe: implications on the cosmological tensions
Joan Solà Peracaula
The possibility that the vacuum energy density (VED) could be time dependent in the expanding Universe is intuitively more reasonable than just a rigid cosmological constant for th…
Vacuum energy and cosmological constant in QFT in curved spacetime
Joan Solà Peracaula, Cristian Moreno-Pulido
The cosmological constant term (CC), , is a pivotal ingredient in the standard model of cosmology or CDM, but it is a rigid quantity for the entire cosmic history. This is…