Brane Mediated Supersymmetry Breaking

Abstract

We propose a mechanism for mediating supersymmetry breaking in Type I string constructions. The basic set-up consists of a system of three D-branes: two parallel D-branes, a matter D-brane and a source D-brane, with supersymmetry breaking communicated via a third D-brane, the mediating D-brane, which intersects both of the parallel D-branes. We discuss an example in which the first and second family matter fields correspond to open strings living on the intersection of the matter D-brane and mediating D-brane, while the gauge fields, Higgs doublets and third family matter fields correspond to open strings living on the mediating D-brane. As in gaugino mediated models, the gauginos and Higgs doublets receive direct soft masses from the source brane, and flavour-changing neutral currents are naturally suppressed since the first and second family squarks and sleptons receive suppressed soft masses. However, unlike the gaugino mediated model, the third family squarks and sleptons receive unsuppressed soft masses, resulting in a very distinctive spectrum with heavier stops, sbottoms and staus.

Version to appear in Nucl.Phys.B. 28 pages, Latex

Cited by in corpus (10)

• Viable models with non-universal gaugino mediated supersymmetry breaking
• Natural Implementation of Neutralino Dark Matter
• A Supersymmetric Standard Model of Inflation with Extra Dimensions
• Supersymmetric Pati-Salam Models from Intersecting D-Branes
• Natural Dark Matter from Type I String Theory
• Supersymmetry and electroweak breaking with large and small extra dimensions
• Supersymmetric Higgs Bosons in a 5D Orbifold Model
• Phenomenology of Twisted Moduli in Type I String Inspired Models
• Twisted Moduli and Supersymmetry Breaking
• Supersymmetric contributions to B --> K pi in the view of recent experimental result