Standard cosmology from sigma-model

Cosmology: Standard Model

Cosmology and the Standard Model ∗

We consider the properties of an ensemble of universes as function of size, where size is defined in terms of the asymptotic value of the Hubble constant (or, equivalently, the value of the cosmological constant). We assume that standard model parameters depend upon size in a manner that we have previously suggested, and provide additional motivation for that choice. Given these assumptions, it...

Beyond the Standard Model of Cosmology

Recent cosmological observations of unprecented accuracy, by WMAP in particular, have established a ‘Standard Model’ of cosmology, just as LEP established the Standard Model of particle physics. Both Standard Models raise open questions whose answers are likely to be linked. The most fundamental problems in both particle physics and cosmology will be resolved only within a framework for Quantum...

Standard Cosmology in the DGP Brane Model

In recent years large extra dimensions which can only be probed by gravitons and eventually non-standard matter have attracted a lot of attention. These models usually yield the correct Newtonian (1/r)-potential at large distances because the gravitational field is quenched on submillimeter transverse scales. This quenching appears either due to finite extension of the transverse dimensions [1]...

Standard cosmology from the brane cosmology with a localized matter

We discuss the brane cosmology in the 5D anti de Sitter Reissner-Nordstrom (AdSRN 5) spacetime. A brane with the tension σ is defined as the edge of an AdSRN 5 space with mass M and charge Q. In this case we get the CFT-radiation term (ρ CF T) from M and the charged dust (ρ 2 cd) from Q 2 in the Friedmann-like equation. However, this equation is not justified because it contains ρ 2 cd-term wit...