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arXiv 2602.01181hep-ex
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测量B衰变到具有缺失能量的最终态的电弱猪圈和轻子风味违反过程:Belle和Belle~II实验

Measurements of electroweak penguin and lepton-flavour violating $B$ decays to final states with missing energy at Belle and Belle~II

Jilin University(吉林大学)

Meihong Liu

AI总结:

Belle和Belle~II实验通过分析B衰变到具有缺失能量的最终态,研究电弱猪圈和轻子风味违反过程,探索稀有衰变现象。

摘要:

Belle和Belle~II实验积累了1.2 ab⁻¹的e⁺e⁻→B B̄碰撞数据,位于Υ(4S)共振点。由于清洁的事件环境和良好的初始状态动力学约束,这些数据非常适合寻找稀有的电弱猪圈和轻子风味违反B衰变,其缺失能量来自中微子。我们报告了b→sνν过程的结果以及解释,同时进行了搜索B→K⁰τ⁺τ⁻以及LFV衰变B⁰→K_S⁰τ±ℓ∓和B⁰→K⁰τ±ℓ∓(ℓ=e,μ)的过程。

英文摘要:

The Belle and Belle~II experiments have accumulated a 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 well-constrained initial-state kinematics, these data are ideally suited for searches for rare electroweak penguin and lepton-flavour violating $B$ decays with missing energy from neutrinos. We report results on $b\to sν\barν$ processes and the interpretation, together with searches for $B\to K^{*0}τ^+τ^-$ and for the LFV decays $B^0\to K_S^0τ^\pm\ell^\mp$ and $B^0\to K^{*0}τ^\pm\ell^\mp$ ($\ell=e,μ$).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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