N-flation: Observable predictions from the random matrix mass spectrum

Journal Article · Sat Sep 15 00:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.063515· OSTI ID:21027765

Kim, Soo A; Liddle, Andrew R ^[1]

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1. Astronomy Centre, University of Sussex, Brighton BN1 9QH (United Kingdom)

We carry out numerical investigations of the perturbations in N-flation models where the mass spectrum is generated by random matrix theory. The tensor-to-scalar ratio and non-Gaussianity are already known to take the single-field values, and so the density perturbation spectral index is the main parameter of interest. We study several types of random field initial conditions and compute the spectral index as a function of mass spectrum parameters. Comparison with microwave anisotropy data from the Wilkinson Microwave Anisotropy Probe shows that the model is currently viable in the majority of its parameter space.

• OSTI ID: 21027765
• Journal Information: Physical Review. D, Particles Fields, Vol. 76, Issue 6; Other Information: DOI: 10.1103/PhysRevD.76.063515; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANISOTROPY
COMPARATIVE EVALUATIONS
COSMOLOGY
DENSITY
MASS SPECTRA
MATRICES
PERTURBATION THEORY
RANDOMNESS
RELICT RADIATION
TENSORS