Search for charged lepton flavor violation in $J/ψ$ decays at BESIII
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arXiv
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866929340316385280 |
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| author | Yu, Xudong |
| author_facet | Yu, Xudong |
| contents | In the Standard Model, charged lepton flavor violation (CLFV) is heavily suppressed by tiny neutrino mass, while many theoretical models can enhance CLFV effects up to a detectable level. The observation of any CLFV process would be a clear signal of new physics beyond SM. BESIII experiment collected 10 billion $J/ψ$ data and searched for CLFV processes $J/ψ\to eτ$ and $eμ$. The upper limits at the 90% confidence level are determined to be $\mathcal{B}(J/ψ\to eτ)<7.5\times 10^{-8}$ and $\mathcal{B}(J/ψ\to eμ)<4.5\times 10^{-9}$, respectively. Improving the previously experimental limits by two orders of magnitudes, the results are the most stringent CLFV searches in the heavy quarkonium system. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_00272 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Search for charged lepton flavor violation in $J/ψ$ decays at BESIII Yu, Xudong High Energy Physics - Experiment In the Standard Model, charged lepton flavor violation (CLFV) is heavily suppressed by tiny neutrino mass, while many theoretical models can enhance CLFV effects up to a detectable level. The observation of any CLFV process would be a clear signal of new physics beyond SM. BESIII experiment collected 10 billion $J/ψ$ data and searched for CLFV processes $J/ψ\to eτ$ and $eμ$. The upper limits at the 90% confidence level are determined to be $\mathcal{B}(J/ψ\to eτ)<7.5\times 10^{-8}$ and $\mathcal{B}(J/ψ\to eμ)<4.5\times 10^{-9}$, respectively. Improving the previously experimental limits by two orders of magnitudes, the results are the most stringent CLFV searches in the heavy quarkonium system. |
| title | Search for charged lepton flavor violation in $J/ψ$ decays at BESIII |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2405.00272 |