Inflation with a running spectral index in supergravity

Details Inflation with a running spectral index in supergravity Inflation with a running spectral index in supergravity

2003-04-16

arxiv.org/abs/hep-ph/0304161v2

Phys.Rev.D68:023508,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 3 figures, to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.68.023508

The first year Wilkinson Microwave Anisotropy Probe data favors primordial adiabatic fluctuation with a running spectral index with $\ns >1$ on a large scale and $\ns <1$ on a smaller scale. The model building of inflation that predicts perturbations with such a spectrum is a challenge, because most models predict fluctuations with either $\ns >1$ (hybrid inflation) or $\ns <1$ (new, chaotic, or topological inflation). We give a sensible particle physics model in supergravity that accommodates the desired running of the spectral index using double inflation.

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