Unparticles and inflation

Abstract

We study some of the roles for unparticles in an inflationary universe. Unparticles by themselves are not appropriate for generating the primordial perturbations since their power spectrum does not match what has been inferred from observations. In fact, when the scaling dimension for the unparticles exceeds three-halves, the unparticle power spectrum diverges. However, when a unparticle couples to an ordinary inflaton particle, loop corrections can produce a slight enhancement of the inflaton's power spectrum at longer wavelengths. We examine these loop corrections from unparticles in some detail to learn how they scale in the wavelength of a perturbation and how they depend on the scaling dimension of the field.

10 pages, 3 eps figures, uses ReVTeX; replaced with published version

References in corpus (13)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Inflation
• The Trans-Planckian Problem of Inflationary Cosmology
• Unparticle Physics
• Another Odd Thing About Unparticle Physics
• The Robustness of Inflation to Changes in Super-Planck-Scale Physics
• Constraining Unparticle Physics with Cosmology and Astrophysics
• Unparticle constraints from SN1987A
• Renormalization of initial conditions and the trans-Planckian problem of inflation
• Unparticle effects in Supernovae cooling
• Constraints on Unparticle Physics from Solar and KamLAND Neutrinos
• The renormalization of the energy-momentum tensor for an effective initial state
• Cosmological Unparticle Correlators

Cited by in corpus (7)

• Banks-Zaks Cosmology, Inflation, and the Big Bang Singularity
• Unparticle-Higgs Mixing: MSW Resonances, See-saw Mechanism and Spinodal Instabilities
• Oscillation dynamics of active-unsterile neutrino mixing in a $2+\tilde{1}$ mixing scheme
• Unsterile-Active Neutrino Mixing: Consequences on Radiative Decay and Bounds from the X-ray Background
• Unparticle effects in neutrino telescopes
• Unparticles: Interpretation and Cosmology
• Strongly Coupled Sectors in Inflation: Gapless Theories and Unparticles