We investigate the communication of supersymmetry breaking to the Standard Model in theories of gauge mediated supersymmetry breaking with general weakly coupled messenger sectors. We calculate the… (More)

We consider the generation of Fayet-Iliopoulos terms at one string loop in some recently found N = 1 open string orbifolds with anomalous U(1) factors with nonvanishing trace of the charge.… (More)

We consider a class of N = 1 supersymmetric Yang-Mills theories, with gauge group SU(N) × SU(N − M) and fundamental matter content. Duality plays an essential role in analyzing the nonperturbative… (More)

We explain why naive discretization results that have appeared in [hep-lat/0006013] do not appear to yield the desired continuum limit. The fermion propagator on the lattice inevitably yields a… (More)

What distinguishes two asymptotically-free non-abelian gauge theories on R, one of which is just below the conformal window boundary and confines, while the other is slightly above the boundary and… (More)

We consider the effects of anomalies on the supersymmetry-breaking parameters in supergravity theories. We construct a supersymmetric expression for the anomalyinduced terms in the 1PI effective… (More)

We construct brane configurations leading to chiral four dimensional N = 1 supersymmetric gauge theories. The brane realizations consist of intersecting Neveu-Schwarz five-branes and Dirichlet… (More)

Csaba Csa ́ki,* Joshua Erlich, 1,† Valentin V. Khoze, 2,‡ Erich Poppitz, 3,§ Yael Shadmi, 4,i and Yuri Shirman Theoretical Division T-8, Los Alamos National Laboratory, Los Alamos, New Mexico 87545… (More)

We study Type I string theory compactified on a T/ZZ3 orientifold. The low-energy dynamics is most conveniently analyzed in terms of D3-branes. We show that a sector of the theory, which corresponds… (More)

We examine the stability of the mass hierarchy in hidden-sector supergravity theories. We show that a quadratically divergent tadpole can appear at two loops, even in minimal supergravity theories,… (More)