论文标题
稀有$ b $衰减会见高质量的drell-yan
Rare $b$ decays meet high-mass Drell-Yan
论文作者
论文摘要
罕见的$ b $强体衰变被认为是微观起源的新半雌性四屈光度相互作用的出色探针。但是,相同的相互作用也纠正了高质量的Drell-Yan尾巴。在这项工作中,我们在这种互补性的背景下重新审视了第一个声明,并将短途新物理学的空间绘制出可能在稀有$ b $衰减中显示的新物理学空间。我们分析了最新的$ b \至q \ ell^+ \ ell^ - $测量值,其中$ q = d $或$ s $和$ \ ell = e $或$ $ $,包括最新的LHCB $ r_ {k^{(*)} $更新,以及最新的充电和中性的高级$ p pl el s,and $ p p pl s,and $ p p。 \ ell^+ \ ell^ - $。我们在Flavio框架内实施了复杂的解释管道,使我们能够彻底有效地研究多维SMEFT参数空间。为了展示Flavio的新功能,我们构建了几个具有$ Z'$或Leptoquark的明确模型,可以解释$ b \ in $ b \ tosμ^+μ^ - $角度分布和分支分数,同时预测Lepton Flaseational(lfu)的比例(lfu)rations(lfu),以至于sm like sm sm like,$ r _} { SM} _ {K^{(*)}} $,如最近的数据所示。然后,这些模型面对全球可能性,包括高质量的Drell-Yan,即发现紧张局势或兼容性。
Rare $b$ hadron decays are considered excellent probes of new semileptonic four-fermion interactions of microscopic origin. However, the same interactions also correct the high-mass Drell-Yan tails. In this work, we revisit the first statement in the context of this complementarity and chart the space of short-distance new physics that could show up in rare $b$ decays. We analyze the latest $b \to q \ell^+ \ell^-$ measurements, where $q = d$ or $s$ and $\ell = e$ or $μ$, including the most recent LHCb $R_{K^{(*)}}$ update, together with the latest charged and neutral current high-mass Drell-Yan data, $p p \to \ell ν$ and $p p \to \ell^+ \ell^-$. We implement a sophisticated interpretation pipeline within the flavio framework, allowing us to investigate the multidimensional SMEFT parameter space thoroughly and efficiently. To showcase the new functionalities of flavio, we construct several explicit models featuring either a $Z'$ or a leptoquark, which can explain the tension in $b \to s μ^+ μ^-$ angular distributions and branching fractions while predicting lepton flavor universality (LFU) ratios to be SM-like, $R_{K^{(*)}} \approx R^{\rm SM}_{K^{(*)}}$, as indicated by the recent data. Those models are then confronted against the global likelihood, including the high-mass Drell-Yan, either finding tensions or compatibility.