Seesaw induced electroweak scale, the hierarchy problemand sub-eV neutrino masses D. Atwood, S. Bar-Shalom and A. Soni Eur. Phys. J. C, 45 1 (2006) 219-225 Published online: 15 January 2006 DOI: 10.1140/epjc/s2005-02403-x