论文标题
DRELL-YAN尾巴超出了标准模型
Drell-Yan Tails Beyond the Standard Model
论文作者
论文摘要
我们调查了$ pp \ to \ellν$的高$ p_t $尾巴和$ pp \ to \ ell \ ell $ drell-yan过程，作为与任意风味结构的半乳相互作用中新物理学的探针。为此，我们提供了$ 2 \ to2 $散射幅度的一般分解，从形式因子来看，我们与特定场景相匹配，例如标准模型有效现场理论（SMEFT），包括所有相关的操作员，最高尺寸$ 8 $，以及紫外线的紫外线与新的博斯多亚级别的量表相交易所交换。通过在Monolepton（$eν$，$μν$，$τν$）和Dilepton（$ ee $，$ ee $，$μμ$，$ττ$，$eμ$，$eμ$，$ ex $，$μτ$）中使用最新的生产频道，我们对Smeft Wilson Ceeffers conterains and Semeftip and performitiation，通过使用最新的LHC Run-II数据（$eν$，$eν$，$μν$，$μν$，$τν$）结构以及所有可能的Leptoquark模型。对于SMEFT，我们讨论了EFT描述的有效性范围，$ \ MATHCAL {O}（1/λ^2）$和$ \ Mathcal {O}（1/λ^4）$截断的相关性，$ d = 8 $运算符的影响以及不同的Quark-fravoravoravoravoravoravormavormavoravoravoravormavormavoravoravoravormavormavoravoravormavoravormavoravoravormavormavoravormavoravoravormavormavoravoravoravormavormavormavoravoravormavormavoravoravormavormavor。最后，作为亮点，我们为几种新物理方案提取了从高$ $ p_t $过程，electroweak杆测量值和低能风味数据的组合限制，用于$ b \ tocτν$过渡，显示了这些不同可观察力之间的互补性。我们的结果在{\ tt highpt}中编译，这是一个{\ tt Mathematica}的软件包，它为用户提供了一种简单的方法，可以使用户为半蛋白质有效运算符和leptoquark型号提取Drell-Yan Tails的可能性。
We investigate the high-$p_T$ tails of the $pp\to \ell ν$ and $pp \to \ell \ell$ Drell-Yan processes as probes of New Physics in semileptonic interactions with an arbitrary flavor structure. For this purpose, we provide a general decomposition of the $2\to2$ scattering amplitudes in terms of form-factors that we match to specific scenarios, such as the Standard Model Effective Field Theory (SMEFT), including all relevant operators up to dimension-$8$, as well as ultraviolet scenarios giving rise to tree-level exchange of new bosonic mediators with masses at the TeV scale. By using the latest LHC run-II data in the monolepton ($eν$, $μν$, $τν$) and dilepton ($ee$, $μμ$, $ττ$, $eμ$, $eτ$, $μτ$) production channels, we derive constraints on the SMEFT Wilson coefficients for semileptonic four-fermion and dipole operators with the most general flavor structure, as well as on all possible leptoquark models. For the SMEFT, we discuss the range of validity of the EFT description, the relevance of $\mathcal{O}(1/Λ^2)$ and $\mathcal{O}(1/Λ^4)$ truncations, the impact of $d=8$ operators and the effects of different quark-flavor alignments. Finally, as a highlight, we extract for several New Physics scenarios the combined limits from high-$p_T$ processes, electroweak pole measurements and low-energy flavor data for the $b\to cτν$ transition, showing the complementarity between these different observables. Our results are compiled in {\tt HighPT}, a package in {\tt Mathematica} which provides a simple way for users to extract the Drell-Yan tails likelihoods for semileptonic effective operators and for leptoquark models.
