论文标题
$ b $介子异常在三胞胎矢量玻色子型模型中，以实现LHCB的最新测量结果
$B$ meson anomalies within the triplet vector boson model to the light of recent measurements from LHCb
论文作者
论文摘要
三胞胎矢量玻色子（TVB）是一种简化的新物理模型，涉及大规模的向量玻色子，转化为弱三重载体。已经提出了这样的模型，作为对sμ^+μ^ - $和$ b \ tocτ\barν_τ$ data（所谓的$ b $ erson异常）的异常$ b \ tosμ^+μ^ - $和$ b \ $的总和。在这项工作中，我们通过合并了有关Lepton风味均值比率$ r（d^{（\ ast）}）= {\ rm br}（\ rm br}（b \ to d^{（\ ast）}τ\ b b b b b b b b b b b b b b b b b r（d^{（\ ast）_ br b b b b b b b r（d^{（brm br），我们通过结合了最新的2022和2023 LHCB测量值，进行了TVB模型的更新视图。 d^{（\ ast）} \ ell^\ prime \barν_ {\ ell^\ prime}）$，$ r（λ_c）= {\ rm br}（λ_b\toλ_ccttoλ_cCτ\barν__ $ r_ {k^{（\ ast）}} = {\ rm br}（b \ to k^{（\ ast）}μ^+μ^ - ）/{\ rm br}（b \ to k^{k^{（\ ast）} e^+e^ - ）$。我们通过新数据和所有相关的低能风味可观察物来探索允许的参数空间。我们的结果面临着最近在大型强子对撞机（LHC）进行的高质量Dilepton搜索。我们发现，对于1 tev的重量TVB质量，对于$ r（d^{（\ ast）}）$的最新LHCB测量值，所有数据都有可能对$ b $ meson异常的常见解释，这与LHC约束保持一致。但是，当人们考虑所有数据以及世界平均值（Babar，Belle和LHCB）上的所有数据时，该框架与LHC界限有很大的紧张关系。为了澄清这种情况，将需要进行未来的测量。最后，还讨论了我们对TVB模型对某些已知风味参数化的现象学分析的含义。
The triplet vector boson (TVB) is a simplified new physics model involving massive vector bosons transforming as a weak triplet vector. Such a model has been proposed as a combined explanation of the anomalous $b \to sμ^+μ^-$ and $b \to c τ\barν_τ$ data (the so-called $B$ meson anomalies). In this work, we carry out an updated view of the TVB model by incorporating the most recent 2022 and 2023 LHCb measurements on the lepton flavor universality ratios $R(D^{(\ast)}) = {\rm BR}(B \to D^{(\ast)}τ\barν_τ)/{\rm BR}(B \to D^{(\ast)}\ell^\prime \barν_{\ell^\prime})$, $R(Λ_c) = {\rm BR}(Λ_b \to Λ_cτ\barν_τ)/{\rm BR}(Λ_b \to Λ_cμ\barν_μ)$, and $R_{K^{(\ast)}} = {\rm BR}(B \to K^{(\ast)}μ^+μ^-)/{\rm BR}(B \to K^{(\ast)}e^+e^-)$. We perform a global fit to explore the allowed parameter space by the new data and all relevant low-energy flavor observables. Our results are confronted with the recent high-mass dilepton searches at the Large Hadron Collider (LHC). We find that for a heavy TVB mass of 1 TeV a common explanation of the $B$ meson anomalies is possible for all data with the recent LHCb measurements on $R(D^{(\ast)})$, in consistency with LHC constraints. However, this framework is in strong tension with LHC bounds when one considers all data along with the world average values (BABAR, Belle, and LHCb) on $R(D^{(\ast)})$. Future measurements will be required in order to clarify such a situation. In the end, the implications of our phenomenological analysis of the TVB model to some known flavor parametrizations are also discussed.
