An extension of the standard model of electro-weak interactions by an extra abelian gauge boson is given, in which the extra gauge boson and the hypercharge gauge boson both couple to an axionicâ€¦ (More)

Sparticle mass hierarchies will play an important role in the type of signatures that will be visible at the Large Hadron Collider. We analyze these hierarchies for the four lightest sparticles for aâ€¦ (More)

Effects of Kaluza-Klein excitations associated with extra dimensions with large radius compactifications on the Fermi constant are explored. It is shown that the current precision determinations ofâ€¦ (More)

An analysis is given of the capability of the LHC to detect narrow resonances using high luminosities and techniques for discriminating among models are discussed. The analysis is carried out withâ€¦ (More)

We consider a generic scenario of spontaneous breaking of supersymmetry in the hidden sector within N = 1 supersymmetric orientifold compactifications of type II string theories with D-branes thatâ€¦ (More)

A broad overview of the current status of proton stability in unified models of particle interactions is given which includes non supersymmetric unification, SUSY and SUGRA unified models,â€¦ (More)

The effects of nonuniversality of gaugino masses on dark matter are examined within supersymmetric grand unification, and in string and D brane models with R parity invariance. In SU(5) unifiedâ€¦ (More)

A Stueckelberg extension of the MSSM with only one abelian vector and one chiral superfield as an alternative to an abelian extension with Higgs scalars is presented. The bosonic sector contains aâ€¦ (More)

We analyze the implications of the new physics effect seen in the g-2 Brookhaven measurement and show that if the effect arises entirely from SUSY, then the sign of the Higgs mixing parameter Î¼ isâ€¦ (More)