Vector portals at future lepton colliders
Abstract We assess the sensitivity of future lepton colliders to weakly coupled vector dark portals (aka “Z ′ bosons”) with masses ranging from tens of GeV to a few TeV. Our analysis focuses on dark photons and L μ – L τ gauge bosons. We consider both visible and invisible decay channels. We demonst...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-08-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP08(2025)029 |
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| Summary: | Abstract We assess the sensitivity of future lepton colliders to weakly coupled vector dark portals (aka “Z ′ bosons”) with masses ranging from tens of GeV to a few TeV. Our analysis focuses on dark photons and L μ – L τ gauge bosons. We consider both visible and invisible decay channels. We demonstrate that both high energy μ colliders and future e + e − colliders, using the FCC-ee Z-pole and ZH operation modes as a benchmark, offer significant improvements in sensitivity. We find that both colliders can enhance the sensitivity to L μ – L τ bosons (for both visible and invisible decays) and to invisibly decaying dark photons by 1–2 orders of magnitude across the relevant mass range. Furthermore, we study the impact of forward μ detectors at the μ-collider on the sensitivity to both models. |
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| ISSN: | 1029-8479 |