Sub-GeV dark matter and multi-decay signatures from dark showers at beam-dump experiments
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866915581692739584 |
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| author | Bernreuther, Elias Hemme, Nicoline Kahlhoefer, Felix Kulkarni, Suchita Ovchynnikov, Maksym |
| author_facet | Bernreuther, Elias Hemme, Nicoline Kahlhoefer, Felix Kulkarni, Suchita Ovchynnikov, Maksym |
| contents | In models of strongly-interacting dark sectors, the production of dark quarks at accelerators can give rise to dark showers with multiple dark mesons in the final state. If some of these dark mesons are sufficiently light and long-lived, they can be detected with searches for displaced vertices at beam-dump experiments and electron-positron colliders. In this work we focus on the case that dark quark production proceeds via effective operators, while the dark sector analogue of the $ρ^0$ meson can decay via kinetic mixing. We evaluate current constraints from NA62 and BaBar as well as sensitivity projections for SHiP and Belle II. We find that there exists a sizable parameter region where SHiP may detect several displaced vertices in a single event and thus obtain valuable information about the structure of the dark sector. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_23696 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Sub-GeV dark matter and multi-decay signatures from dark showers at beam-dump experiments Bernreuther, Elias Hemme, Nicoline Kahlhoefer, Felix Kulkarni, Suchita Ovchynnikov, Maksym High Energy Physics - Phenomenology High Energy Physics - Experiment In models of strongly-interacting dark sectors, the production of dark quarks at accelerators can give rise to dark showers with multiple dark mesons in the final state. If some of these dark mesons are sufficiently light and long-lived, they can be detected with searches for displaced vertices at beam-dump experiments and electron-positron colliders. In this work we focus on the case that dark quark production proceeds via effective operators, while the dark sector analogue of the $ρ^0$ meson can decay via kinetic mixing. We evaluate current constraints from NA62 and BaBar as well as sensitivity projections for SHiP and Belle II. We find that there exists a sizable parameter region where SHiP may detect several displaced vertices in a single event and thus obtain valuable information about the structure of the dark sector. |
| title | Sub-GeV dark matter and multi-decay signatures from dark showers at beam-dump experiments |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2510.23696 |