Prospects for Spin-1 Resonance Search at 13 TeV LHC and the ATLAS Diboson Excess

Motivated by ATLAS diboson excess around 2 TeV, we investigate a phenomenology of spin-1 resonances in a model where electroweak sector in the SM is weakly coupled to strong dynamics. The spin-1 resonances, W' and Z', are introduced as effective degree of freedoms of the dynamical sector. We explore several theoretical constraints by investigating the scalar potential as well as current bounds from the LHC and precision measurements. It is found that the main decay modes are V' -> VV and V' -> Vh, and the width is narrow enough so that the ATLAS diboson excess can be explained. In order to investigate future prospects, we also perform collider simulations at the 13 TeV LHC, and obtain a model independent expected exclusion limit for the process pp -> W' -> WZ -> JJ. We show that parameter regions where the diboson excess can be explained still exit, and are within a reach of the LHC RUN2 at the integrated luminosity of 10 fb-1.