Dissecting the Wjj Anomaly : Diagnostic Tests of a

We examine the scenario where a leptophobic Z ′ boson accounts for the excess of events in the Wjj channel as observed by CDF. We assume generation independent couplings for the Z ′ and obtain allowed regions for the four hadronic couplings using the measured cross section as well as constraints from dijet production at UA2. These coupling regions translate into well-determined rates for the associated production of Z/γ + Z ′ at the Tevatron and LHC, as well as W + Z ′ at the LHC,that are directly correlated with the Wjj rate observed at the Tevatron. The Wjj rate at the LHC is large and this channel should be observed soon once the SM backgrounds are under control. The rates for Z/γ+Z ′ associated production are smaller, and these processes should not yet have been observed at the Tevatron given the expected SM backgrounds. In addition, we show that more coupling information is obtainable from the MWZ′ distribution. Once detected, these processes will provide further valuable information on the Z ′ boson couplings. Work supported by the Department of Energy, Contract DE-AC02-76SF00515 e-mail: hewett, [email protected]