Nonisotropy in the CMB power spectrum in single field inflation

Journal Article · Wed Jul 15 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.023526· OSTI ID:21316214

Donoghue, John F ^[1]; Dutta, Koushik ^[1]; Ross, Andreas ^[1]

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1. Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003 (United States)

Contaldi et al.[C. R. Contaldi, M. Peloso, L. Kofman, and A. Linde, J. Cosmol. Astropart. Phys. 07 (2003) 002] have suggested that an initial period of kinetic energy domination in single field inflation may explain the lack of CMB power at large angular scales. We note that in this situation it is natural that there also be a spatial gradient in the initial value of the inflaton field, and that this can provide a spatial asymmetry in the observed CMB power spectrum, manifest at low values of l. We investigate the nature of this asymmetry and comment on its relation to possible anomalies at low l.

• OSTI ID: 21316214
• Journal Information: Physical Review. D, Particles Fields, Vol. 80, Issue 2; Other Information: DOI: 10.1103/PhysRevD.80.023526; (c) 2009 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
ASYMMETRY
FIELD THEORIES
KINETIC ENERGY
RELICT RADIATION
SPECTRA