Intersecting branes, SUSY breaking and the 2 TeV excess at the LHC

Intersecting D-brane models in string theory can naturally support the gauge and matter content of left-right symmetric extensions of the Standard Model with gauge symmetry SU(3)(c) x SU(2)(L) x SU(2)(R) x U(1)(B-L). Considering such models as candidates for explaining the 2 TeV excesses seen in Run-1 by both ATLAS and CMS, the minimal possible scale of supersymmetry breaking is determined by the requirement of precise one-loop gauge coupling unification. For the vector-like, bifundamental and (anti-) symmetric Higgs content of such brane configurations, this comes out fairly universally at around 19 TeV. For the SU(2) R gauge coupling one finds values 0 : 48 < gR (M-R) < 0.6. Threshold corrections can potentially lower the scale of supersymmetry breaking.