Relaxing Axions

Details Relaxing Axions Relaxing Axions

1999-02-05

arxiv.org/abs/hep-ph/9902254v1

Phys.Lett.B454:92-97,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTex 12 pages

Scientific paper

10.1016/S0370-2693(99)00368-8

A mechanism for lifting the cosmological upper bound on the axion decay
constant, $f_a$, is proposed. It entails the near masslessness of the radial
mode whose vacuum expectation value is $f_a$. Energy in the coherent
oscillations of the axion field in the early universe gets fed into the motion
of the radial mode, from which it is then redshifted away.

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