Multi-Lepton Probes of the Drell-Yan Production of Triplet Higgses
Siddharth P. Maharathy, Srimoy Bhattacharya, Andreas Crivellin, Mukesh Kumar, Rachid Mazini, Bruce Mellado

TL;DR
This paper explores whether a Real Higgs Triplet model can explain observed excesses in triboson production at the LHC, finding it consistent but not favored over the Standard Model, with future data needed for clarification.
Contribution
It investigates the potential of the $ ext{Delta}$SM Higgs triplet model to account for LHC triboson excesses through electroweak scalar production and decay.
Findings
Current data shows a 2.6$\sigma$ preference for new physics.
The $ ext{Delta}$SM predicts more events than observed, aligning with data but not favoring it.
Future Run 3 and HL-LHC data could clarify the model's viability.
Abstract
Excesses in di-photon, , and spectra indicate the existence of a new Higgs boson with mass GeV. However, no excess is observed in the channel. This pattern aligns with a Real Higgs Triplet model with hypercharge (SM). A prediction of this model is the Drell--Yan production of scalars at the LHC, which dominantly decay to electroweak bosons, thus enhancing the cross sections of triboson channels such as , , and . Interestingly, both ATLAS and CMS have reported higher-than-expected significances for such processes: (observed) vs (expected) in the (where or ) channel and vs in , suggesting the possibility that these signals may be manifestations of an extended Higgs sector. We investigate whether the SM can account for these triboson excesses through…
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