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

Abstract

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 degrees of freedom of the dynamical sector. We explore several theoretical constraints by investigating the scalar potential of the model as well as the current bounds from the LHC and precision measurements. It is found that the main decay modes are V' -> VV and V' -> Vh, and the V' 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 find a parameter space where the diboson excess can be explained, and are within a reach of the LHC at the integrated luminosity of 10 fb-1 and 13 TeV.

38 pages, 19 figures, 1 table; minor changes, references added, version published in JHEP

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• Hadron Collider Searches for Diboson Resonances
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• Alternative search strategies for a BSM resonance fitting ATLAS diboson excess
• Left-right non-linear dynamical Higgs
• ATLAS Diboson Excess from Stueckelberg Mechanism
• On the compatibility of the diboson excess with a gg-initiated composite sector
• Diboson excess and $Z^{\prime }$-predictions via left-right non-linear Higgs
• Angular observables for spin discrimination in boosted diboson final states
• Classification of simple heavy vector triplet models