标题： 多重轻子多重希格斯玻色子信号 显示英文标题

标题： Multi-Lepton Signals of Multiple Higgs Bosons

摘要： 我们识别并研究了在LHC上扩展希格斯场的新型多轻子信号，以CP和味守恒的双希格斯二重态模型（2HDM）的形式出现。 而不是为特定的2HDM信号设计单独的搜索，我们采用许多独立的多轻子搜索通道的组合来探测所有产生和衰变过程的整体信号。 2HDM的多轻子信号可能来自多种来源，包括CP不变标量$h$和$H$通过胶子融合与$h,H \to ZZ^{(*)}$的产生，或者与矢量玻色子或顶夸克的关联产生，其中$h,H \to WW^{(*)}, ZZ^{(*)},\tau\tau$。 其他来源包括通过轻量CP-偶标量、CP-奇标量、$A$或带电标量$H^\pm$衰变的重CP-偶标量的胶子融合产生，例如$H \to hh$、$H \to AA$、$H \to H^+ H^-$、$H \to ZA$，其中包含$A \to Zh, \tau\tau$、$H^\pm \to Wh$和$h \to WW^*, ZZ^*,\tau\tau$。 总的来说，结合的多轻子信号可能大大超过标准模型希格斯玻色子的信号，并为扩展的希格斯规范提供了敏感的探测手段。 作为原理证明，我们使用模型参数与信号之间的分解映射过程，通过模拟在20个独立的多轻子通道中接受度乘以效率，来确定四种不同守恒味的2HDM参数空间中的多轻子灵敏度，这些通道对应于每个参数空间内的四个基准2HDM光谱的222种独立的产生和衰变拓扑结构。 将这些灵敏度与CMS合作组使用从7 TeV$pp$碰撞中收集的5 fb$^{-1}$数据进行的多轻子搜索结果进行比较，得出了之前其他类型的直接实验搜索尚未覆盖的2HDM参数空间区域的新限制。 显示英文摘要

摘要： We identify and investigate novel multi-lepton signatures of extended Higgs sectors at the LHC in the guise of CP- and flavor-conserving two-Higgs-doublet models (2HDMs). Rather than designing individual searches tailored to specific 2HDM signals, we employ the combination of many exclusive multi-lepton search channels to probe the collective signal from the totality of production and decay processes. Multi-lepton signals of 2HDMs can arise from a variety of sources, including Standard Model-like production of the CP-even scalars, $h$ and $H$, through gluon-fusion with $h,H \to ZZ^{(*)}$, or associated production with vector bosons or top quarks, with $h,H \to WW^{(*)}, ZZ^{(*)},\tau\tau$. Additional sources include gluon-fusion production of the heavy CP-even scalar with decays through the light CP-even scalar, the CP-odd scalar, $A$, or the charged scalar, $H^\pm$, such as $H \to hh$, $H \to AA$, $H \to H^+ H^-$, $H \to ZA$, with $A \to Zh, \tau\tau$, $H^\pm \to Wh$, and $h \to WW^*, ZZ^*,\tau\tau$. Altogether, the combined multi-lepton signal may greatly exceed that of the Standard Model Higgs boson and provides a sensitive probe of extended Higgs sectors. As a proof of principle, we use a factorized mapping procedure between model parameters and signatures to determine multi-lepton sensitivities in four different flavor conserving 2HDM parameter spaces by simulating the acceptance times efficiency in 20 exclusive multi-lepton channels for 222 independent production and decay topologies that arise for four benchmark 2HDM spectra within each parameter space. A comparison of these sensitivities with the results of a multi-lepton search conducted by the CMS collaboration using 5 fb$^{-1}$ of data collected from 7 TeV $pp$ collisions yields new limits in regions of 2HDM parameter space that have not previously been covered by other types of direct experimental searches.