论文标题
在LHC上测试$ \ bar b \ bar b \ to d^{（*）} l \barν$中的Leptoquark/eft
Testing Leptoquark/EFT in $\bar B \to D^{(*)} l\barν$ at the LHC
论文作者
论文摘要
我们研究了当前在新物理（NP）上的LHC界限，这些界限$ \ bar b \ to d^{（*）} l \barν$ for $ l =（e，μ，μ，τ）$，通过考虑leptoquark（lq）型号和有效的（eft）汉密尔顿。从$ L+\ text {Missing} $搜索具有高$ P_T $的实验分析用于评估有关Wilson系数的NP约束。这项工作的一个新点是显示适用的LHC结合的LQ和EFT之间的差异。特别是，我们发现EFT描述在LHC处搜索质量小于$ \ lyssim 10 \，\ text {tev} $的LQ无效，并导致高估的范围。我们还讨论了高光度LHC搜索的未来前景，包括背景和信号事件的电荷不对称性。最后，给出了风味和LHC边界的组合摘要，然后我们看到在几种NP方案中，LHC约束与风味相媲美。
We investigate the current LHC bounds on New Physics (NP) that contributes to $\bar B \to D^{(*)} l\barν$ for $l = (e,μ,τ)$ by considering both leptoquark (LQ) models and an effective-field-theory (EFT) Hamiltonian. Experimental analyses from $l+\text{missing}$ searches with high $p_T$ are applied to evaluate the NP constraints with respect to the Wilson coefficients. A novel point of this work is to show difference between LQs and EFT for the applicable LHC bound. In particular, we find that the EFT description is not valid to search for LQs with the mass less than $\lesssim 10\,\text{TeV}$ at the LHC and leads to overestimated bounds. We also discuss future prospects of high luminosity LHC searches including the charge asymmetry of background and signal events. Finally, a combined summary for the flavor and LHC bounds is given, and then we see that in several NP scenarios the LHC constraints are comparable with the flavor ones.
