The Cosmic Microwave Background Bispectrum and Inflation

Details The Cosmic Microwave Background Bispectrum and Inflation The Cosmic Microwave Background Bispectrum and Inflation

1999-07-29

arxiv.org/abs/astro-ph/9907431v1

Phys.Rev.D61:063504,2000

Astronomy and Astrophysics

Astrophysics

10 pages, no figures

Scientific paper

10.1103/PhysRevD.61.063504

We derive an expression for the non-Gaussian cosmic-microwave-background (CMB) statistic $I_l^3$ defined recently by Ferreira, Magueijo, and G\'orski in terms of the slow-roll-inflation parameters $\epsilon$ and $\eta$. This result shows that a nonzero value of $I_l^3$ in COBE would rule out single-field slow-roll inflation. A sharp change in the slope of the inflaton potential could increase the predicted value of $I_l^3$, but not significantly. This further suggests that it will be difficult to account for such a detection in multiple-field models in which density perturbations are produced by quantum fluctuations in the scalar field driving inflation. An Appendix shows how to evaluate an integral that is needed in our calculation as well as in more general calculations of CMB bispectra.

Affiliated with

Also associated with

No associations

Rating

The Cosmic Microwave Background Bispectrum and Inflation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Cosmic Microwave Background Bispectrum and Inflation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Cosmic Microwave Background Bispectrum and Inflation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-464100