Determining See-Saw Parameters from Weak Scale Measurements?

Details Determining See-Saw Parameters from Weak Scale Measurements? Determining See-Saw Parameters from Weak Scale Measurements?

2001-04-08

arxiv.org/abs/hep-ph/0104076v2

JHEP 0109:013,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

Version to be published. References added, modified abstract, minor stylistic changes. Content unchanged

Scientific paper

10.1088/1126-6708/2001/09/013

The see-saw mechanism is a very attractive explanation for small neutrino masses, parametrized at the GUT scale by the right-handed Majorana mass matrix, ${\cal M}$, and the neutrino Yukawa matrix, ${\bf Y_\nu}$. We show that in a SUSY model with universal soft terms, ${\cal M}$ and ${\bf Y_\nu}$ can be calculated from the light neutrino masses, the MNS matrix, and ${\bf Y^{\dagger}_\nu} {\bf Y_\nu}$, which enters into the left-handed slepton radiative corrections. This suggests that in principle the GUT-scale inputs of the seesaw could be reconstructed from the neutrino and sneutrino mass matrices. We briefly discuss why this is impractical, but advocate the neutrino and sneutrino mass matrices as an alternative bottom-up parametrization of the seesaw.

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