Search for the rare decays of $D\to h(h^{(')})e^{+}e^{-}$
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866910054861504512 |
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| author | BESIII collaboration |
| author_facet | BESIII collaboration |
| contents | We search for 15 rare decays of $D$ mesons to hadrons accompanied by an electron-positron pair $D\to h(h^{(')})e^{+}e^{-}$, based on 20.3 fb$^{-1}$ of $e^+ e^-$ collision data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector at BEPCII. No significant signals are observed, and the corresponding upper limits on the branching fractions at the 90\% confidence level are determined. The sensitivities of the results are at the level of $10^{-6}$ $\sim$ $10^{-7}$. The upper limits on the branching fractions for the $D^+\to ρ^{+} e^+ e^-$, $D^+\to K^{*+} e^+ e^-$, $D^0\to K_S^0 K_S^0 e^+ e^-$, $D^0\to π^0 π^0 e^+ e^-$ and $D^0\to η^{\prime} e^+ e^-$ decay channels are measured for the first time. For the $D^0\to π^0 e^+ e^-$, $D^0\to ηe^+ e^-$, $D^0\to ωe^+ e^-$, $D^0\to K_S^0 e^+ e^-$, $D^+\to π^+ π^0 e^+ e^-$, $D^+\to K^+ π^0 e^+ e^-$, $D^+\to π^+ K_S^0 e^+ e^-$ and $D^+\to K^+ K_S^0 e^+ e^-$ decay channels, the upper limits on the branching fractions are determined, with an improvement of at least a factor of four compared to previous searches. The upper limits on the branching fractions for the $D^0\to ρ^{0} e^+ e^-$ and $D^0\to ϕe^+ e^-$ decay channels are set at $0.7 \times 10^{-6}$ and $4.6 \times 10^{-6}$, respectively. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_15575 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Search for the rare decays of $D\to h(h^{(')})e^{+}e^{-}$ BESIII collaboration High Energy Physics - Experiment We search for 15 rare decays of $D$ mesons to hadrons accompanied by an electron-positron pair $D\to h(h^{(')})e^{+}e^{-}$, based on 20.3 fb$^{-1}$ of $e^+ e^-$ collision data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector at BEPCII. No significant signals are observed, and the corresponding upper limits on the branching fractions at the 90\% confidence level are determined. The sensitivities of the results are at the level of $10^{-6}$ $\sim$ $10^{-7}$. The upper limits on the branching fractions for the $D^+\to ρ^{+} e^+ e^-$, $D^+\to K^{*+} e^+ e^-$, $D^0\to K_S^0 K_S^0 e^+ e^-$, $D^0\to π^0 π^0 e^+ e^-$ and $D^0\to η^{\prime} e^+ e^-$ decay channels are measured for the first time. For the $D^0\to π^0 e^+ e^-$, $D^0\to ηe^+ e^-$, $D^0\to ωe^+ e^-$, $D^0\to K_S^0 e^+ e^-$, $D^+\to π^+ π^0 e^+ e^-$, $D^+\to K^+ π^0 e^+ e^-$, $D^+\to π^+ K_S^0 e^+ e^-$ and $D^+\to K^+ K_S^0 e^+ e^-$ decay channels, the upper limits on the branching fractions are determined, with an improvement of at least a factor of four compared to previous searches. The upper limits on the branching fractions for the $D^0\to ρ^{0} e^+ e^-$ and $D^0\to ϕe^+ e^-$ decay channels are set at $0.7 \times 10^{-6}$ and $4.6 \times 10^{-6}$, respectively. |
| title | Search for the rare decays of $D\to h(h^{(')})e^{+}e^{-}$ |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2603.15575 |