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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2605.01488 |
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| _version_ | 1866917454548041728 |
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| author | Maharathy, Siddharth P. Bhattacharya, Srimoy Crivellin, Andreas Kumar, Mukesh Mazini, Rachid Mellado, Bruce |
| author_facet | Maharathy, Siddharth P. Bhattacharya, Srimoy Crivellin, Andreas Kumar, Mukesh Mazini, Rachid Mellado, Bruce |
| contents | Excesses in di-photon, $Zγ$, and $WW$ spectra indicate the existence of a new Higgs boson with mass $152 \pm 1$ GeV. However, no excess is observed in the $ZZ$ channel. This pattern aligns with a Real Higgs Triplet model with hypercharge $Y = 0$ ($Δ$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 $WWZ$, $WZZ$, and $WWW$. Interestingly, both ATLAS and CMS have reported higher-than-expected significances for such processes: $6.4σ$ (observed) vs $4.7σ$ (expected) in the $VVZ$ (where $V = W$ or $Z$) channel and $4.4σ$ vs $3.6σ$ in $WWZ$, suggesting the possibility that these signals may be manifestations of an extended Higgs sector. We investigate whether the $Δ$SM can account for these triboson excesses through electroweak production and decay of triplet scalars. We find that while current data prefers a non-zero new physics signal ($2.6σ$), the $Δ$SM predicts more events than observed, such that it is consistent with data but not preferred over the SM. However, this tension could be clarified with Run~3 and HL-LHC data. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_01488 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Multi-Lepton Probes of the Drell-Yan Production of Triplet Higgses Maharathy, Siddharth P. Bhattacharya, Srimoy Crivellin, Andreas Kumar, Mukesh Mazini, Rachid Mellado, Bruce High Energy Physics - Phenomenology Excesses in di-photon, $Zγ$, and $WW$ spectra indicate the existence of a new Higgs boson with mass $152 \pm 1$ GeV. However, no excess is observed in the $ZZ$ channel. This pattern aligns with a Real Higgs Triplet model with hypercharge $Y = 0$ ($Δ$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 $WWZ$, $WZZ$, and $WWW$. Interestingly, both ATLAS and CMS have reported higher-than-expected significances for such processes: $6.4σ$ (observed) vs $4.7σ$ (expected) in the $VVZ$ (where $V = W$ or $Z$) channel and $4.4σ$ vs $3.6σ$ in $WWZ$, suggesting the possibility that these signals may be manifestations of an extended Higgs sector. We investigate whether the $Δ$SM can account for these triboson excesses through electroweak production and decay of triplet scalars. We find that while current data prefers a non-zero new physics signal ($2.6σ$), the $Δ$SM predicts more events than observed, such that it is consistent with data but not preferred over the SM. However, this tension could be clarified with Run~3 and HL-LHC data. |
| title | Multi-Lepton Probes of the Drell-Yan Production of Triplet Higgses |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2605.01488 |