Cosmic microwave background and large-scale structure constraints on a simple quintessential inflation model

Details Cosmic microwave background and large-scale structure constraints on a simple quintessential inflation model Cosmic microwave background and large-scale structure constraints on a simple quintessential inflation model

2006-11-07

arxiv.org/abs/astro-ph/0611241v1

Phys.Rev.D75:043513,2007

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures

Scientific paper

10.1103/PhysRevD.75.043513

We derive constraints on a simple quintessential inflation model, based on a spontaneously broken Phi^4 theory, imposed by the Wilkinson Microwave Anisotropy Probe three-year data (WMAP3) and by galaxy clustering results from the Sloan Digital Sky Survey(SDSS). We find that the scale of symmetry breaking must be larger than about 3 Planck masses in order for inflation to generate acceptable values of the scalar spectral index and of the tensor-to-scalar ratio. We also show that the resulting quintessence equation-of-state can evolve rapidly at recent times and hence can potentially be distinguished from a simple cosmological constant in this parameter regime.

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