Radiative Inflation and Dark Energy

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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15 pages, 4 figures; v2: references added, appendix added, Section 5 slightly modified; content matches published version

Scientific paper

10.1103/PhysRevD.84.083524

We propose a model based on radiative symmetry breaking that combines inflation with Dark Energy and is consistent with the WMAP 7-year regions. The radiative inflationary potential leads to the prediction of a spectral index 0.955 \lesssim n_S \lesssim 0.967 and a tensor to scalar ratio 0.142 \lesssim r \lesssim 0.186, both consistent with current data but testable by the Planck experiment. The radiative symmetry breaking close to the Planck scale gives rise to a pseudo Nambu-Goldstone boson with a gravitationally suppressed mass which can naturally play the role of a quintessence field responsible for Dark Energy. Finally, we present a possible extra dimensional scenario in which our model could be realised.

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