Axions in inflationary cosmology

Details Axions in inflationary cosmology Axions in inflationary cosmology

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phlb..259...38l&link_type=abstract

Physics Letters B, Volume 259, Issue 1-2, p. 38-47.

Physics

438

Scientific paper

The problem of the cosmological constraints on the axion mass is re-examined. It is argued that in the context of inflationary cosmology the constraint ma>~10-5 eV can be avoided even when the axion perturbations produced during inflation are taken into account. It is shown also that in most axion models the effective parameter ƒ;a rapidly changes during inflation. This modifies some earlier statements concerning isothermal perturbations in the axion cosmology. A hybrid inflation scenario is proposed which combines some advantages of chaotic inflation with specific features of new and/or extended inflation. Its implications for theaxion cosmology are discussed.
On leave of absence from Lebedev Physical Institute, SU- 117 924 Moscow, USSR and CERN, CH-1211 Geneva 23, Switzerland.

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