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Title: Confronting DGP braneworld gravity with cosmico observations after Planck data

The normal branch of Dvali-Gabadadze-Porrati braneworld gravity with brane tension is confronted by the currently available cosmic observations from the geometrical and dynamical perspectives. On the geometrical side, the type Ia supernova as standard candle, the baryon acoustic oscillation as standard ruler and the cosmic microwave background measurement from the first released 15.5 months data were used to fix the background evolutions. On the dynamical side, the redshift space distortion data will be used to determine the evolution of the matter perturbation. Through a Markov chain Monte Carlo analysis, we found the dimensionless crossover scale Ω{sub r{sub c}} = 1/(4H{sup 2}{sub 0}r{sup 2}{sub c}) = 0.00183{sub −0.00183}{sup +0.000338} in a spatially flat normal branch of Dvali-Gabadadze-Porrati braneworld. This result suggests that the crossover scale r{sub c} should be around 12H{sup −1}{sub 0} which is consistent with the previous result r{sub c} > 3H{sup −1}{sub 0} and greater. It also implies that the five-dimensional gravity effect is weak to be observed in H{sup −1}{sub 0} scale.
Authors:
 [1]
  1. Institute of Theoretical Physics, School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, 116024 (China)
Publication Date:
OSTI Identifier:
22370676
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 02; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BARYONS; BRANES; GRAVITATION; MARKOV PROCESS; MATTER; MONTE CARLO METHOD; M-THEORY; OSCILLATIONS; PERTURBATION THEORY; RED SHIFT; RELICT RADIATION; SPACE