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

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2007-02-16

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We derive constraints on a simple quintessential inflation model, based on a spontaneously broken Φ4 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. © 2007 The American Physical Society.

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Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 75, n. 4, 2007.

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