Publications [#269819] of David R. Smith

Papers Published
  1. Goldberger, WD; Nomura, Y; Smith, DR, Warped supersymmetric grand unification, Physical Review D, vol. 67 no. 7 (2003) [doi] .

    We construct a realistic theory of grand unification in AdS5 truncated by branes, in which the unified gauge symmetry is broken by boundary conditions and the electroweak scale is generated by the AdS warp factor. We show that the theory preserves the successful gauge coupling unification of the 4D MSSM at the leading-logarithmic level. Kaluza-Klein (KK) towers, including those of the XY gauge and colored Higgs multiplets, appear at the TeV scale, while the extra dimension provides natural mechanisms for doublet-triplet splitting and proton decay suppression. In one possible scenario supersymmetry is strongly broken on the TeV brane, in which case the lightest SU/(3) C × SU(2)L × U(1)Y gauginos are approximately Dirac and the mass of the lightest XY gaugino is pushed well below that of the lowest gauge boson KK mode, improving the prospects for its production at the CERN LHC. The bulk Lagrangian possesses a symmetry that we call GUT parity. If GUT parity is exact, the lightest GUT particle, most likely an XY gaugino, is stable. Once produced in a collider, the XY gaugino hadronizes to form mesons, some of which will be charged and visible as highly ionizing tracks. The lightest supersymmetric particle is the gravitino of mass ∼ 10-3 eV, which is also stable if R parity is conserved. © 2003 The American Physical Society.