Leptons and photons at the LHC: cascades through spinless adjoints

We study the hardon collider phenomenlogy of (1,0) Kaluza-Klein moded along two universal extra dimensions compactified on the chiral square. Cascade decays of spinless adjoint procedd through tree-level 3-body decays involving leptons as well as one-loop 2-body decays involving photons.As a result, spectacular events with as many a six charged leptons, or one photon plus four charged leptons are expected to be observed at the LHC. Unusual events with relatively large branching fractions include three leptons of same charge plus one lepton of opposite charge, or one photon photon plus tow leptons of same charge. We estimate the current limit from the Tevatron on the compactification scale, set by searches for trilepton events, to be around 270 GeV.