Singlets in Supersymmetry
Abstract
Description
It is argued that singlet extensions of the MSSM at the weak scale are indicative of either gauged-$R$ symmetry or target space duality in a string effective action at the Planck scale. The criteria used are satisfactory primordial nucleosynthesis, absence of fine-tuning, and absence of cosmological problems such as domain walls. Models which have a global discrete symmetry such as the NMSSM may only be accommodated within rather complicated cosmological scenarios which are also discussed.
23 pages, no figures, plain LaTeX, mistake in references corrected
23 pages, no figures, plain LaTeX, mistake in references corrected