We show that the present experimental limits on electron-nucleon interactions that violate both parity and time reversal invariance provide new stringent bounds on the imaginary parts of some of the products of the R-parity violating coupling constants in the R-parity violating Minimal Supersymmetric Standard Model. 11.30.Er,12.60.Jv,32.10.Dk Typeset using REVTEX

Several topics from the subject of supersymmetric field theories are reviewed. We first present the structure of the minimal supersymmetric standard model. Next we discuss the issue of the doublet-triplet splitting problem in supersymmetric grand unified theories. We show some necessary conditions which a viable model has to satisfy and present three models which successfully solve the doublet-...

We describe a recent program from the study of definable groups in certain o-minimal structures. A central notion of this program is that of a (geometric) lattice. We propose a definition of a lattice in an arbitrary first-order structure. We then use it to describe, uniformly, various structure theorems for o-minimal groups, each time recovering a lattice that captures some significant invaria...

Effective Supersymmetry is presented as a theory of physics above the electroweak scale which has significant theoretical advantages over both the standard model and the Minimal Supersymmetric Standard model (MSSM). The theory is supersymmetric at short distances but differs significantly from the MSSM: there is no supersymmetric CP problem and flavor changing neutral currents and lepton flavor...