Testing lepton-flavor-violating decay of doubly charged Higgs bosons in type-II seesaw via photon fusion at the high-energy LHC
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arXiv
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| Natura: | Preprint |
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2026
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| _version_ | 1866911718037258240 |
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| author | Zhou, Hang Liu, Ning |
| author_facet | Zhou, Hang Liu, Ning |
| contents | Tiny neutrino masses can be explained by the type-II seesaw mechanism, where a triplet scalar under $SU(2)_{L}$ is predicted. Collider searches for this exotic scalar have been extensively conducted, especially for its doubly charged component $Δ^{\pm\pm}$. Utilizing the forward detectors at the Large Hadron Collider (LHC), we study the probing sensitivity for the elastic photon fusion production of the scalars $pp\to p(γγ\toΔ^{++}Δ^{--})p$ followed by the lepton-flavor-violating (LFV) decay channels $Δ^{\pm\pm}\to e^{\pm}μ^{\pm}$. With a high center-of-mass energy of 100 TeV and several luminosity scenarios, we can extensively broaden the exclusion bounds in the parametric space of Br$(Δ^{\pm\pm}\to e^{\pm}μ^{\pm})$ versus the triplet scalar mass $m_Δ$. Specifically, at the 100 TeV LHC with an integrated luminosity of 3 ab$^{-1}$, the mass exclusion limit at 95\% C.L. can reach around 1150 GeV with the assumption of inverted neutrino mass hierarchy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_26487 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Testing lepton-flavor-violating decay of doubly charged Higgs bosons in type-II seesaw via photon fusion at the high-energy LHC Zhou, Hang Liu, Ning High Energy Physics - Phenomenology Tiny neutrino masses can be explained by the type-II seesaw mechanism, where a triplet scalar under $SU(2)_{L}$ is predicted. Collider searches for this exotic scalar have been extensively conducted, especially for its doubly charged component $Δ^{\pm\pm}$. Utilizing the forward detectors at the Large Hadron Collider (LHC), we study the probing sensitivity for the elastic photon fusion production of the scalars $pp\to p(γγ\toΔ^{++}Δ^{--})p$ followed by the lepton-flavor-violating (LFV) decay channels $Δ^{\pm\pm}\to e^{\pm}μ^{\pm}$. With a high center-of-mass energy of 100 TeV and several luminosity scenarios, we can extensively broaden the exclusion bounds in the parametric space of Br$(Δ^{\pm\pm}\to e^{\pm}μ^{\pm})$ versus the triplet scalar mass $m_Δ$. Specifically, at the 100 TeV LHC with an integrated luminosity of 3 ab$^{-1}$, the mass exclusion limit at 95\% C.L. can reach around 1150 GeV with the assumption of inverted neutrino mass hierarchy. |
| title | Testing lepton-flavor-violating decay of doubly charged Higgs bosons in type-II seesaw via photon fusion at the high-energy LHC |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2605.26487 |