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| Main Author: | |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2604.22079 |
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| _version_ | 1866910160922869760 |
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| author | Liu, Meihong |
| author_facet | Liu, Meihong |
| contents | The Belle and Belle~II experiments have accumulated a combined data set of $1.2~\mathrm{ab}^{-1}$ of $e^+e^- \to B\bar{B}$ collisions at the $Υ(4S)$ resonance. Owing to the clean event environment and the well-constrained initial-state kinematics, these data are particularly well suited for studying channels involving missing energy from neutrinos. This includes the reinterpretation of $B^+\to K^+ν\barν$ and the first inclusive measurement of $B\to X_sν\barν$ with the missing energy directly from $B$ decays, as well as searches involving missing energy from $τ$ decays, such as $B^0\to K^{*0}τ^+τ^-$, $B^0\to K_S^{0}τ^+τ^-$, and $B^+\to K^{+}τ^+τ^-$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_22079 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | $b\to s\ell^+\ell^- (\ell = e, μ, τ)$ and $b\to sν\barν$ at Belle and Belle II Liu, Meihong High Energy Physics - Experiment The Belle and Belle~II experiments have accumulated a combined data set of $1.2~\mathrm{ab}^{-1}$ of $e^+e^- \to B\bar{B}$ collisions at the $Υ(4S)$ resonance. Owing to the clean event environment and the well-constrained initial-state kinematics, these data are particularly well suited for studying channels involving missing energy from neutrinos. This includes the reinterpretation of $B^+\to K^+ν\barν$ and the first inclusive measurement of $B\to X_sν\barν$ with the missing energy directly from $B$ decays, as well as searches involving missing energy from $τ$ decays, such as $B^0\to K^{*0}τ^+τ^-$, $B^0\to K_S^{0}τ^+τ^-$, and $B^+\to K^{+}τ^+τ^-$. |
| title | $b\to s\ell^+\ell^- (\ell = e, μ, τ)$ and $b\to sν\barν$ at Belle and Belle II |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2604.22079 |