The four-lepton signal efficiencies in ATLAS's doubly charged Higgs search exceed a strict analytical ceiling, so the corrected expected mass limits are roughly 100 GeV weaker.
On the Robustness of type-II Seesaw Collider Searches
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abstract
Electroweak triplet Higgs sector extensions are well-motivated scenarios to address lepton flavour observations. These models can also be strongly constrained by combining precise, indirect low-energy measurements with direct searches for exotic, doubly charged Higgs bosons. Together, these searches set competitive constraints on the type-II seesaw mechanism. In this work, we consider extensions of the type-II seesaw, specifically through the lens of a modified collider phenomenology. Surveying motivated extensions, we map out changes in expected correlations, focusing on the modified production and decay phenomenology of exotic Higgs particles. This enables us to assess the robustness of the type-II seesaw collider constraints against extended new-physics contributions that modify standard sensitivity expectations and projections.
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Revised exclusion limits on doubly charged Higgs bosons from a reanalysis of the ATLAS multi-lepton search at $\sqrt{s} = 13$,TeV
The four-lepton signal efficiencies in ATLAS's doubly charged Higgs search exceed a strict analytical ceiling, so the corrected expected mass limits are roughly 100 GeV weaker.