Model Independent Signatures of New Physics in the Inflationary Power Spectrum

Abstract

We compute the universal generic corrections to the inflationary power spectrum due to unknown high-energy physics. We arrive at this result via a careful integrating out of massive fields in the "in-in" formalism yielding a consistent and predictive low-energy effective description in time-dependent backgrounds. We find that the power spectrum is universally modified at order H/M, where H is the scale of inflation. This is qualitatively different from the universal corrections in time-independent backgrounds, and it suggests that such effects may be present in upcoming cosmological observations.

5 pages, 1 figure; corrected cutoff procedure

References in corpus (4)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Features of heavy physics in the CMB power spectrum
• CMBPol Mission Concept Study: Probing Inflation with CMB Polarization
• Observing trans-Planckian ripples in the primordial power spectrum with future large scale structure probes

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