Abstract
We investigate the prospects for spin determination of a heavy diboson resonance using angular observables. Focusing in particular on boosted fully hadronic final states, we detail both the differences in signal efficiencies and distortions of differential distributions resulting from various jet substructure techniques. We treat the 2 TeV diboson excess as a case study, but our results are generally applicable to any future discovery in the diboson channel. Scrutinizing ATLAS and CMS analyses at 8 TeV and 13 TeV, we find that the specific cuts employed in these analyses have a tremendous impact on the discrimination power between different signal hypotheses. We discuss modified cuts that can offer a significant boost to spin sensitivity in a post-discovery era. Even without altered cuts, we show that CMS, and partly also ATLAS, will be able to distinguish between spin 0, 1, or 2 new physics diboson resonances at the 2σ level with 30 fb−1 of 13 TeV data, for our 2 TeV case study.
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Buschmann, M., Yu, F. Angular observables for spin discrimination in boosted diboson final states. J. High Energ. Phys. 2016, 36 (2016). https://doi.org/10.1007/JHEP09(2016)036
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DOI: https://doi.org/10.1007/JHEP09(2016)036