243 articles – 3618 Notices  [english version]
HAL : in2p3-00068662, version 1

Fiche détaillée  Récupérer au format
Physical Review D (2006) 083525
Big bang nucleosynthesis constraints on scalar-tensor theories of gravity
A. Coc1, K.A. Olive, J.-P. Uzan, E. Vangioni
(2006)

We investigate BBN in scalar-tensor theories of gravity with arbitrary matter couplings and self-interaction potentials. We first consider the case of a massless dilaton with a quadratic coupling to matter. We perform a full numerical integration of the evolution of the scalar field and compute the resulting light element abundances. We demonstrate in detail the importance of particle mass thresholds on the evolution of the scalar field in a radiation dominated universe. We also consider the simplest extension of this model including a cosmological constant in either the Jordan or Einstein frame.
1 :  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Physique/Relativité Générale et Cosmologie Quantique

Physique/Physique des Hautes Energies - Phénoménologie

Planète et Univers/Astrophysique
nucleosynthesis – cosmology – gravitation
Lien vers le texte intégral : 
http://fr.arXiv.org/abs/astro-ph/0601299