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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2604.10405 |
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| _version_ | 1866914466294136832 |
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| author | Li, Zhi-Jun You, Zheng-Yun |
| author_facet | Li, Zhi-Jun You, Zheng-Yun |
| contents | The BESIII experiment has collected a large data sample of charmonium, charm mesons, hyperons, and other light mesons. These data provide a unique opportunity to explore the dark sector and rare decays. We present recent dark sector results from the BESIII experiment, including searches for sub-GeV dark matter in $η\to π^0 + \text{invisible}$ and $J/ψ\to ϕ+ \text{invisible}$, searches for dark baryon particles in $Ξ^- \to π^- +\rm{invisible}$, and searches for light vector bosons in $χ_{cJ} \to J/ψX$, where $X \to e^+ e^-$. In addition, we also present the recent rare decay searches, including a search for $ψ\to e μ$, as well as searches for several baryon number and lepton number violation processes, and searches for various charmonium weak decays. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_10405 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Search for dark sector and rare decays at BESIII Li, Zhi-Jun You, Zheng-Yun High Energy Physics - Experiment The BESIII experiment has collected a large data sample of charmonium, charm mesons, hyperons, and other light mesons. These data provide a unique opportunity to explore the dark sector and rare decays. We present recent dark sector results from the BESIII experiment, including searches for sub-GeV dark matter in $η\to π^0 + \text{invisible}$ and $J/ψ\to ϕ+ \text{invisible}$, searches for dark baryon particles in $Ξ^- \to π^- +\rm{invisible}$, and searches for light vector bosons in $χ_{cJ} \to J/ψX$, where $X \to e^+ e^-$. In addition, we also present the recent rare decay searches, including a search for $ψ\to e μ$, as well as searches for several baryon number and lepton number violation processes, and searches for various charmonium weak decays. |
| title | Search for dark sector and rare decays at BESIII |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2604.10405 |