Evidence for Kaluza-Klein excitations of the graviton, gluon and quark at LHC

Following our paper showing evidence for a sequence of Kaluza-Klein gravitons, we interpret the massive 4 jet excesses observed by CMS in RUN2 and RUN3 data. They could come from the decay of two heavy KK gluons gkk(3.6TeV) and gkk(8.6TeV) into pairs of KK quarks qkk(1TeV) and qkk(2.1TeV). Present limits on gkk seem to exclude gkk(3.6TeV) but these limits assume a dominant decay into top pairs, which can be questioned as was the case in our study of KK graviton decays. The cross section predicted for gkk(8.6) requires a BR into a pair of qkk(2.1TeV) or order 10% which is not unlikely. Prospect for reaching a 6 s.d. level local evidence with RUN3 data are promising for 3 channels.