ar X iv : 0 80 8 . 04 70 v 2 [ he p - ph ] 1 8 A ug 2 00 8 Gravity in Gauge Mediation

ar X iv : 0 80 8 . 04 70 v 1 [ he p - ph ] 4 A ug 2 00 8 Gravity in Gauge Mediation

We investigate O’Raifeartaigh-type models for F-term supersymmetry breaking in gauge mediation scenarios in the presence of gravity. It is pointed out that the vacuum structure of those models is such that in metastable vacua gravity mediation contribution to scalar masses is always suppressed to the level below 1 percent, almost sufficient for avoiding FCNC problem. Close to that limit, gravit...

A Toy Model for Gauge-Mediation in Intersecting Brane Models

We discuss the phenomenology of a toy intersecting brane model where supersymmetry is dynamically broken in an open string hidden sector and gauge-mediated to the visible sector. Scalar masses ∼ TeV are easily realizable, and R-symmetry is broken. These ideas are easily generalizable to other intersecting brane models. August 2008 ar X iv :0 80 8. 12 64 v2 [ he pth ] 1 3 A ug 2 00 8

ar X iv : 0 80 8 . 02 85 v 1 [ he p - ph ] 3 A ug 2 00 8 Hints from Tevatron , a prelude to what ?

We comment on the recent results from the Tevatron experiments in the W+jets channel and consider some models as the possible underlying physical theories. We also list some channels for further studies.

ar X iv : 0 80 8 . 10 23 v 1 [ qu an t - ph ] 7 A ug 2 00 8 CATEGORICAL QUANTUM MECHANICS

ar X iv : 0 80 8 . 10 17 v 1 [ he p - la t ] 7 A ug 2 00 8 Efficient use of the Generalized Eigenvalue Problem

We analyze the systematic errors made when using the generalized eigenvalue problem to extract energies and matrix elements in lattice gauge theory. Effective theories such as HQET are also discussed. Numerical results are shown for the extraction of ground-state and excited B-meson masses and the ground-state decay constant in the static approximation.