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arXiv · 1904.03995

Exclusion of heavy, broad resonances from precise measurements of WZ and VH final states at the LHC

You-Ying Li·Rosy Nicolaidou·Stathes Paganis
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Abstract

A novel search for heavy vector resonances in the $H\rightarrow b\bar{b}$ and $Z\rightarrow b\bar{b}$ final states in association with a leptonically decaying $V$ ($Z$ or $W$) and $W$-only respectively, is proposed. It is argued that excesses with respect to the Standard Model prediction should be observed in all final states (0, 1 or 2 leptons), with the 1-lepton final state being the strongest. Since the relative strengths of these excesses depend on branching ratios and efficiencies, this is a clear signal for the presence of heavy resonances or their low mass tails. A general vector-triplet model is used to explore the discovery potential as a function of the resonance mass and width. Recent Higgs to $b\bar{b}$ observation data reported by the experiments ATLAS and CMS are used to test the model. Current limits are extended to resonance widths over mass as large as 9%.

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You-Ying Li, Rosy Nicolaidou, Stathes Paganis. 2019-04-08. Exclusion of heavy, broad resonances from precise measurements of WZ and VH final states at the LHC. https://doi.org/10.1140/epjc%2Fs10052-019-6858-5

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