A Lesson from R τ τ K ( * ) $R_{\tau \tau }^{K^{(\ast )}}$ and R ν ν K ( * ) $R_{\nu \nu }^{K^{(\ast )}}$ at Belle II

IF 5.6 3区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Fortschritte Der Physik-Progress of Physics Pub Date : 2023-11-07 DOI:10.1002/prop.202300200

Arturo de Giorgi, Gioacchino Piazza

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Abstract

Within the assumption of Left-Handed (LH) New Physics (NP), the relations between $B (B \to K^{(*)} τ^{+} τ^{-})$ and $B (B \to K^{(*)} ν \bar{ν})$ for several Beyond the Standard Model (BSM) scenarios are reviewed, commonly considered to explain the Lepton flavor Universality (LFU) violation observed in charged and neutral-current semileptonic B decays. The latest $R_{D^{(*)}}$ world averages that include the recent LHCb measurement and assess the possibility of simultaneously explaining B-anomalies without spoiling current bounds on di-neutrino and di-tau modes are employed. 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.

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R τ τ K ( * ) $R_{tau \tau }^{K^{(\ast )}}$ 和 R ν ν K ( * ) $R_{nu \nu }^{K^{(\ast )}}$ 在 Belle II 的教训

在左手（LH）新物理（NP）的假设条件下，回顾了几种超越标准模型（BSM）方案的B ( B → K ( * ) τ + τ - ) $\mathcal {B}(B\rightarrow K^{(\ast )} \tau ^+\tau ^-)$和B ( B → K ( * ) ν ν ¯ ) $\mathcal {B}(B\rightarrow K^{(\ast )} \nu \bar\{nu })$之间的关系，这些方案通常被认为是为了解释在带电和中性电流半轻子B衰变中观测到的质子味道普遍性（LFU）违反。最新的 R D ( * ) $R_{D^{(\ast )}}$ 世界平均值包括了最近的大型强子对撞机（LHCb）测量结果，并评估了同时解释 B 反常现象而不破坏当前对二中微子和二陶模式的约束的可能性。鉴于 "贝利 II "即将得出中微子方面的结果，以及 tau 模式的精度和灵敏度不断提高，这一点尤为重要。

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来源期刊

Fortschritte Der Physik-Progress of Physics 物理-物理：综合

CiteScore

6.70

自引率

7.70%

发文量

审稿时长

6-12 weeks

期刊介绍： The journal Fortschritte der Physik - Progress of Physics is a pure online Journal (since 2013). Fortschritte der Physik - Progress of Physics is devoted to the theoretical and experimental studies of fundamental constituents of matter and their interactions e. g. elementary particle physics, classical and quantum field theory, the theory of gravitation and cosmology, quantum information, thermodynamics and statistics, laser physics and nonlinear dynamics, including chaos and quantum chaos. Generally the papers are review articles with a detailed survey on relevant publications, but original papers of general interest are also published.