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Phys. Rev. Lett. 99, 031301 (2007) [4 pages]

Seesaw Mechanism for Scalar Fields as Possible Basis for Dark Energy

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Kari Enqvist1,*, Steen Hannestad2,†, and Martin S. Sloth2,‡
1Helsinki Institute of Physics, P.O. Box 64, FIN-00014 University of Helsinki, Finland
2Department of Physics and Astronomy, University of Aarhus DK-8000 Aarhus C, Denmark

Received 12 March 2007; published 20 July 2007

We propose a novel mechanism for dark energy, based on an extended seesaw for scalar fields, which does not require any new physics at energies below the TeV scale. A very light quintessence mass is usually considered to be technically unnatural, unless it is protected by some symmetry broken at the new very light scale. We propose that one can use an extended seesaw mechanism to construct technically natural models for very light fields, protected by supersymmetry softly broken above a TeV.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.031301
DOI:
10.1103/PhysRevLett.99.031301
PACS:
95.36.+x, 98.80.Cq

*enqvist@helsinki.fi

sth@phys.au.dk

sloth@phys.au.dk