Search for doubly charged scalars in type-II seesaw mechanism through photon fusion at the LHC
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arXiv
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| Natura: | Preprint |
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2025
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| _version_ | 1866916909727875072 |
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| author | Zhou, Hang Liu, Ning |
| author_facet | Zhou, Hang Liu, Ning |
| contents | Small neutrino masses can be generated through the well-known seesaw mechanisms, among which the type-II scenario predicts a triplet scalar with doubly charged components. Except for the Drell-Yan production at the Large Hadron Collider (LHC), the doubly charged scalars $Δ^{\pm\pm}$ can also be produced through photon fusion along with ultraperipheral collision of protons, the outgoing protons from which can be detected by forward detectors at the LHC, providing a promising way to explore related new physics. We study the pair production through such processes at the 14 TeV LHC, focusing on the final states of $μ^{+}μ^{+}μ^{-}μ^{-}$ and $e^{+}e^{+}e^{-}e^{-}$ under normal (NH) and inverted hierarchy (IH) of the neutrino mass spectra, respectively. Promising sensitivity can be reached via our proposed search strategy. With luminosity of 36.1 fb$^{-1}$(100 fb$^{-1}$), $m_Δ\sim430(520)$ GeV can be excluded at 95% C.L. under the NH via $μ^{+}μ^{+}μ^{-}μ^{-}$ states searching, while the mass bound can be extended to 730(880) GeV under the IH via $e^{+}e^{+}e^{-}e^{-}$ states. The exclusion limits on $m_Δ$ can be improved up to 1 TeV and even higher with integrated luminosity accumulated to 3 ab$^{-1}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_11336 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Search for doubly charged scalars in type-II seesaw mechanism through photon fusion at the LHC Zhou, Hang Liu, Ning High Energy Physics - Phenomenology Small neutrino masses can be generated through the well-known seesaw mechanisms, among which the type-II scenario predicts a triplet scalar with doubly charged components. Except for the Drell-Yan production at the Large Hadron Collider (LHC), the doubly charged scalars $Δ^{\pm\pm}$ can also be produced through photon fusion along with ultraperipheral collision of protons, the outgoing protons from which can be detected by forward detectors at the LHC, providing a promising way to explore related new physics. We study the pair production through such processes at the 14 TeV LHC, focusing on the final states of $μ^{+}μ^{+}μ^{-}μ^{-}$ and $e^{+}e^{+}e^{-}e^{-}$ under normal (NH) and inverted hierarchy (IH) of the neutrino mass spectra, respectively. Promising sensitivity can be reached via our proposed search strategy. With luminosity of 36.1 fb$^{-1}$(100 fb$^{-1}$), $m_Δ\sim430(520)$ GeV can be excluded at 95% C.L. under the NH via $μ^{+}μ^{+}μ^{-}μ^{-}$ states searching, while the mass bound can be extended to 730(880) GeV under the IH via $e^{+}e^{+}e^{-}e^{-}$ states. The exclusion limits on $m_Δ$ can be improved up to 1 TeV and even higher with integrated luminosity accumulated to 3 ab$^{-1}$. |
| title | Search for doubly charged scalars in type-II seesaw mechanism through photon fusion at the LHC |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2508.11336 |