论文标题
$ r_ {ττ}^{k^{（\ ast）}} $和$ r_ {ννν}^{K^{（\ ast）}} $的课程
A lesson from $R_{ττ}^{K^{(\ast)}}$ and $R_{νν}^{K^{(\ast)}}$ at Belle II
论文作者
论文摘要
在假设左撇子（LH）新物理学（NP）的假设中，我们回顾了$ \ Mathcal {b}（b \ to K^{（\ ast）}τ^+τ^ - ）$和$ \ Mathcal {b}（b \ to k^to k^{（\ ast）c {b barmiiles for barm，被认为解释了在充电和中性流动的半衰减$ b $衰减中观察到的Lepton风味普遍性（LFU）。我们采用最新的$ r_ {d^{（\ ast）}} $ World平均值，包括最近的LHCB测量值，并评估同时解释$ b $ nothomalies的可能性，而不会破坏Di-Neutrino和Di-Tau模式的电流界限。鉴于Belle II对中微子的即将到来的结果以及在TAU模式下达到的准确性和灵敏度的持续提高，这尤其重要。
Within the assumption of Left-Handed (LH) New Physics (NP), we review the relations between $\mathcal{B}(B\to K^{(\ast)} τ^+τ^-)$ and $\mathcal{B}(B\to K^{(\ast)} ν\bar ν)$ for several Beyond the Standard Model (BSM) scenarios, commonly considered to explain the Lepton flavor Universality (LFU) violation observed in charged and neutral-current semileptonic $B$ decays. We employ the latest $R_{D^{(\ast)}}$ world averages that include the recent LHCb measurement and assess the possibility of simultaneously explaining the $B$-anomalies without spoiling current bounds on di-neutrino and di-tau modes. This is particularly relevant in light of the upcoming results by Belle II on neutrinos and the continuing improvement in accuracy and sensitivity achieved in tau modes.
