Natural inflation: Particle physics models, power-law spectra for large-scale structure, and constraints from the Cosmic Background Explorer

Journal Article · Fri Jan 15 00:00:00 EST 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.47.426· OSTI ID:6943409

Adams, F C ^[1]; Bond, J R ^[2]; Freese, K ^[1]; Frieman, J A ^[3]; Olinto, A V ^[4]

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1. Physics Department, University of Michigan, Ann Arbor, Michigan 48109 (United States) Institute for Theoretical Physics, University of California, Santa Barbara, Santa Barbara, California 93106 (United States)
2. Canadian Institute for Advanced Research, Cosmology Program, Canadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, Ontario, M5S 1A1 (Canada)
3. NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510 (United States) Institute for Theoretical Physics, University of California, Santa Barbara, Santa Barbara, California 93106 (United States)
4. Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois

We discuss the particle physics basis for models of natural inflation with pseudo Nambu-Goldstone bosons and study the consequences for large-scale structure of the nonscale-invariant density fluctuation spectra that arise in natural inflation and other models. A pseudo Nambu-Goldstone boson, with a potential of the form [ital V]([phi])=[Lambda][sup 4][1[plus minus]cos([phi]/[ital f])], can naturally give rise to an epoch of inflation in the early Universe, if [ital f][similar to][ital M][sub Pl] and [Lambda][similar to][ital M][sub GUT]. Such mass scales arise in particle physics models with a gauge group that becomes strongly interacting at the grand unified theory scale. We work out a specific particle physics example based on the multiple gaugino condensation scenario in superstring theory. We then study the cosmological evolution of and constraints upon these inflation models numerically and analytically. To obtain sufficient inflation with a probability of order 1 and a high enough post-inflation reheat temperature for baryogenesis, we require [ital f][approx gt]0.3[ital M][sub Pl].

• OSTI ID: 6943409
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 47:2; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
MAGNETIC MONOPOLES
COSMIC RADIATION
AXIONS
BACKGROUND RADIATION
COSMOLOGY
GAUGE INVARIANCE
GOLDSTONE BOSONS
GRAND UNIFIED THEORY
HUBBLE EFFECT
INFLATIONARY UNIVERSE
NONLUMINOUS MATTER
QUANTUM CHROMODYNAMICS
SCALAR FIELDS
SUPERSYMMETRY
SYMMETRY BREAKING
BOSONS
COSMOLOGICAL MODELS
ELEMENTARY PARTICLES
FIELD THEORIES
INVARIANCE PRINCIPLES
IONIZING RADIATIONS
MATHEMATICAL MODELS
MATTER
MONOPOLES
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
RADIATIONS
SYMMETRY
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
662110* - General Theory of Particles & Fields- Theory of Fields & Strings- (1992-)
662120 - General Theory of Particles & Fields- Symmetry
Conservation Laws
Currents & Their Properties- (1992-)
662230 - Quantum Chromodynamics- (1992-)