Probing two universal extra dimensions at international linear collider

We discuss collider signatures of (1,1)(1,1)th Kaluza–Klein (KK) mode vector bosons in the framework of two universal extra dimension model  , at a future e+e−e+e− collider. Production of Bμ(1,1) and W3μ(1,1), the (1,1)(1,1)th KK mode vector bosons, are considered in association with a hard photon. Without caring about the decay products of Bμ(1,1) or W3μ(1,1), one can measure the masses of these particles just by looking at the photon energy distribution. Once produced Bμ(1,1) (W3μ(1,1)) dominantly decays to a pair of jets or to a pair of top quarks. Thus we look for a pair of jets or a pair of top quarks in association with a photon. Upto the kinematic limit (with e+e−e+e− center-of-mass energies of 0.5 TeV and 1 TeV) of the collider, signals from the Bμ(1,1) production and decay in both the above mentioned channels are greater than the 5σ   fluctuation of the Standard Model background with 500 fb−1500 fb−1 integrated luminosity. However, the number of events from W3μ(1,1) production and decay is smaller and its detection prospect is not very good.