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

• Autor(a) principal: Rosenfeld, Rogerio [UNESP]
• Data de Publicação: 2007
• Outros Autores: Frieman, Joshua A.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1103/PhysRevD.75.043513; http://hdl.handle.net/11449/224864

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.