Short Distance Physics and Initial State Effects on the CMB Power Spectrum

Details Short Distance Physics and Initial State Effects on the CMB Power Spectrum Short Distance Physics and Initial State Effects on the CMB Power Spectrum

2008-09-25

arxiv.org/abs/0809.4312v2

Phys.Rev.D78:123502,2008

Physics

High Energy Physics

High Energy Physics - Theory

29 pages, 5 figures, v2

Scientific paper

10.1103/PhysRevD.78.123502

We investigate a modification in the action of inflaton due to noncommutativity leads to a nonstandard initial vacuum and oscillatory corrections in the initial power spectrum. We show that the presence of these oscillations causes a drop in the WMAP $\chi^{2}$ about $\Delta\chi^{2}\sim 8.5$. As a bonus, from the parameter estimation done in this work, we show that the noncommutative parameters can be precisely bound to $10^{16}$ GeV or $10^{4}$ GeV depending on the inflation scale.

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