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×SU(2)_L×SU(2)_R×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 0.48R(M_R)<0.6. Threshold corrections can potentially lower the scale of supersymmetry breaking.