Natural inflation with pseudo Nambu-Goldstone bosons
Journal Article
·
· Physical Review Letters; (USA)
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA (USA)
- NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, IL (USA)
We show that 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. Successful inflation can be achieved 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 a scale {similar to}{Lambda}, e.g., as can happen in superstring theories. The density fluctuation spectrum is non-scale-invariant, with extra power on large length scales.
- OSTI ID:
- 6051443
- Journal Information:
- Physical Review Letters; (USA), Vol. 65:26; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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