Couplings and spectra in modular inflation

Details Couplings and spectra in modular inflation Couplings and spectra in modular inflation

2007-01-25

arxiv.org/abs/hep-ph/0701213v2

Phys.Rev.D77:023535,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, format changed, some corrections of formulas

Scientific paper

10.1103/PhysRevD.77.023535

We analyze how the spectrum of perturbations produced in a multi-component modular inflation model proposed by Kadota and Stewart depends on couplings between the two moduli. Although some simple direct couplings give essentially the same results as the original model, $dn/d\ln k \propto n-1$, simple indirect couplings produce a power law spectrum, $n-1 = \textrm{constant}$, which can naturally be close to scale invariant.

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