English

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

High Energy Physics - Theory 2008-12-18 v2

Abstract

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 χ2\chi^{2} about Δχ28.5\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 101610^{16} GeV or 10410^{4} GeV depending on the inflation scale.

Cite

@article{arxiv.0809.4312,
  title  = {Short Distance Physics and Initial State Effects on the CMB Power Spectrum},
  author = {Moslem Zarei},
  journal= {arXiv preprint arXiv:0809.4312},
  year   = {2008}
}

Comments

29 pages, 5 figures, v2

R2 v1 2026-06-21T11:23:58.628Z