Scale invariance, unimodular gravity and dark energy

By M. Shaposhnikov, Daniel Zenhausern. 2008

239 citations recorded by the source corpus.

We demonstrate that the combination of the ideas of unimodular gravity, scale invariance, and the existence of an exactly massless dilaton leads to the evolution of the universe supported by present observations: inflation in the past, followed by the radiation and matter dominated stages and accelerated expansion at present. All mass scales in this type of theories come from one and the same source.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/4d6f71592be23d1fff4f50b07cca9814c005903d

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In Astronomy and Astrophysics

In Nuclear and High Energy Physics

Citations in the corpus

A Postquantum Theory of Classical Gravity? (2018, unknown): “…necessary that the dynamics be invariant under the choice of N and N a , and there are sensible theories which break this, such as shape dynamics [157 – 159] or unim-odular gravity [160 – 166], but it is desirable to have some local symmetry, even if it is not full diffeomorphism invariance.”
Cosmology and Fundamental Physics with the Euclid Satellite (2012, background): “This partial fixed point (other beta functions do not vanish) suggests an enhancement of symmetry at that scale, and the presence of a Nambu–Goldstone boson (the dilaton field) associated with the breaking of scale invariance [820].”
Higgs inflation: consistency and generalisations (2010, background): “This may indicate that the UVcomplete theory has an exact, but spontaneously broken quantum scale invariance, relevant also for gauge hierarchy, cosmological constant, and dark energy problems [ 31 , 32].”
Higgs Inflation (2018, unknown): “[84–98].”
The Role of Sterile Neutrinos in Cosmology and Astrophysics (2008, unknown): “In this section we discuss in detail how the parameters of the Lagrangian (5) should be chosen so as to explain the BSM phenomena without introducing new physics above the electroweak scale.”