Publications associées à Technically natural dark energy from Lorentz breaking

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Scalar masses in general N=2 gauged supergravity theories

Claudio Scrucca, Paul Smyth, Francesca Catino

We readdress the question of whether any universal upper bound exists on the square mass m(2) of the lightest scalar around a supersymmetry breaking vacuum in generic N=2 gauged supergravity theories for a given gravitino mass m(3/2) and cosmological const ...

Springer2014

Cosmological constraints on Lorentz violating dark energy

Julien Lesgourgues, Sergey Sibiryakov, Diego Blas Temino, Benjamin Audren

The role of Lorentz invariance as a fundamental symmetry of nature has been lately reconsidered in different approaches to quantum gravity. It is thus natural to study whether other puzzles of physics may be solved within these proposals. This may be the c ...

Iop Publishing Ltd2013

Two Accurate Time-Delay Distances From Strong Lensing: Implications For Cosmology

Frédéric Courbin, Georges Meylan, Malte Tewes

Strong gravitational lenses with measured time delays between the multiple images and models of the lens mass distribution allow a one-step determination of the time-delay distance, and thus a measure of cosmological parameters. We present a blind analysis ...

American Astronomical Society2013

Conservative constraints on early cosmology with MONTE PYTHON

Julien Lesgourgues, Benjamin Audren

Models for the latest stages of the cosmological evolution rely on a less solid theoretical and observational ground than the description of earlier stages like BBN and recombination. As suggested in a previous work by Vonlanthen et al., it is possible to ...

Iop Publishing Ltd2013

Higgs-dilaton cosmology: An effective field theory approach

Georgios Karananas, Javier Rubio

The Higgs-dilaton cosmological model is able to describe simultaneously an inflationary expansion in the early Universe and a dark energy dominated stage responsible for the present day acceleration. It also leads to a nontrivial relation between the spect ...

Amer Physical Soc2013

A naturally light dilaton

Riccardo Rattazzi, Duccio Pappadopulo, Paolo Lodone, Lorenzo Vitale

Goldstone's theorem does not apply straightforwardly to the case of spontaneously broken scale invariance. We elucidate under what conditions a light scalar degree of freedom, identifiable with the dilaton, can naturally arise. Our construction can be cons ...

Springer2013

Low-l CMB analysis and inpainting

Jean-Luc Starck, Anaïs Marie Rassat

Reconstructing the cosmic microwave background (CMB) in the Galactic plane is extremely difficult due to the dominant foreground emissions such as dust, free-free or synchrotron. For cosmological studies, the standard approach consists in masking this area ...

Edp Sciences S A2013

Simple metastable de Sitter vacua in N=2 gauged supergravity

Claudio Scrucca, Paul Smyth, Francesca Catino

We construct a simple class of N=2 gauged supergravity theories that admit metastable de Sitter vacua, generalizing the recent work done in the context of rigid supersymmetry. The setup involves one hypermultiplet and one vector multiplet spanning suitably ...

Springer2013

Optimal polarisation equations in FLRW universes

Julien Lesgourgues

This paper presents the linearised Boltzmann equation for photons for scalar, vector and tensor perturbations in flat, open and closed FLRW cosmologies. We show that E- and B-mode polarisation for all types can be computed using only a single hierarchy. Th ...

Iop Publishing Ltd2013

Technically natural dark energy from Lorentz breaking

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Scalar masses in general N=2 gauged supergravity theories

Topological inflation from the Starobinsky model in supergravity

Cosmological constraints on Lorentz violating dark energy

Two Accurate Time-Delay Distances From Strong Lensing: Implications For Cosmology

Conservative constraints on early cosmology with MONTE PYTHON

Higgs-dilaton cosmology: An effective field theory approach

A naturally light dilaton

Low-l CMB analysis and inpainting

Simple metastable de Sitter vacua in N=2 gauged supergravity

Optimal polarisation equations in FLRW universes

Two Accurate Time-Delay Distances From Strong Lensing: Implications For Cosmology

Cosmological constraints on Lorentz violating dark energy

Scalar masses in general N=2 gauged supergravity theories

Conservative constraints on early cosmology with MONTE PYTHON

Higgs-dilaton cosmology: An effective field theory approach

Simple metastable de Sitter vacua in N=2 gauged supergravity

A naturally light dilaton

Low-l CMB analysis and inpainting

Optimal polarisation equations in FLRW universes

Topological inflation from the Starobinsky model in supergravity