Identifying Large Extra Dimensions in Dilepton Production at the Large Hadron Collider

Abstract

By considering the present and future LHC energy regimes, we reanalyze the potential of the LHC to discover the effects of large extra dimensions and to discriminate between various theoretical models. We explore the capability of the LHC to distinguish spin-2 Kaluza–Klein towers of gravitons exchange from other new physics effects which might be conveniently parameterized by the four-fermion contact interactions. We find that the LHC with planned energy 14 TeV and luminosity 100 fb-1 will be capable of discovering (and identifying) graviton exchange effects in the large extra dimensions with the cutoff parameter of order MS = 6.2 TeV (4.8 TeV) for d = 6 and MS = 8.8 TeV (6.8 TeV) for d = 3.