eprintid: 2905
rev_number: 7
eprint_status: archive
userid: 69
dir: disk0/00/00/29/05
datestamp: 2015-11-16 15:47:37
lastmod: 2015-11-16 15:47:37
status_changed: 2015-11-16 15:47:37
type: article
metadata_visibility: show
creators_name: Saracco, Fabio
creators_name: Pietroni, M.
creators_name: Tetradis, N.
creators_name: Pettorino, V.
creators_name: Robbers, G.
creators_id: fabio.saracco@imtlucca.it
creators_id: 
creators_id: 
creators_id: 
creators_id: 
title: Nonlinear matter spectra in coupled quintessence
ispublished: pub
subjects: QC
divisions: EIC
full_text_status: public
abstract: We consider cosmologies in which a dark-energy scalar field interacts with cold dark matter. The growth of perturbations is followed beyond the linear level by means of the time-renormalization-group method, which is extended to describe a multicomponent matter sector. Even in the absence of the extra interaction, a scale-dependent bias is generated as a consequence of the different initial conditions for baryons and dark matter after decoupling. The effect is enhanced significantly by the extra coupling and can be at the 2%–3% level in the range of scales of baryonic acoustic oscillations. We compare our results with N-body simulations, finding very good agreement.
date: 2010-07
date_type: published
publication: Physical Review D
volume: 82
publisher: American Physical Society
pagerange: 023528
id_number: 10.1103/PhysRevD.82.023528
refereed: TRUE
issn: 1550-7998
official_url: http://link.aps.org/doi/10.1103/PhysRevD.82.023528
citation:   Saracco, Fabio and Pietroni, M. and Tetradis, N. and Pettorino, V. and Robbers, G.  Nonlinear matter spectra in coupled quintessence.  Physical Review D, 82.  023528.  ISSN 1550-7998      (2010)  
document_url: http://eprints.imtlucca.it/2905/1/0911.5396v4.pdf