arXiv:hep-ph/0604218
Field Theory on Multi-throat Backgrounds
Authors: Giacomo Cacciapaglia, Csaba Csaki, Christophe Grojean, John Terning
Abstract: We consider extra dimensional field theory descriptions of
backgrounds with N different throats where one of the extra dimensions
in each throat is much larger than the others. Such backgrounds can be
described by field theory on N 5D warped spaces which intersect on a
ultraviolet (UV) brane. Given a field that propagates in all N throats
there are N boundary conditions on the UV brane (which are determined by
the effective Lagrangian on the UV brane) in addition to the boundary
conditions on the N infrared branes. We derive a general set of UV
boundary conditions and give examples of how they are applied to
particular situations. Three simple example applications are given: in
the first the number of families is determined by the number of throats
and the SUSY flavor problem is solved via an S_3 symmetry of the
throats; in the second we embed this scenario in a SUSY GUT with a
solution of the doublet-triplet splitting problem based on the product
group approach; while in the final example we show a simple geometric
implementation of a SUSY trinification model on three throats.