论文标题
HL-LHC处的重型希格斯和矢量般的费米的结合签名
Combined signatures of heavy Higgses and vectorlike fermions at the HL-LHC
论文作者
论文摘要
在具有矢量夸克和瘦小的两个希格斯双重模型的扩展中，新标量或费米子的衰减可以通过另一个的存在来改变，这取决于新物理学的层次结构。如果新的费米斯比希格斯重，那么它们的衰变可能由带电和中性的沉重的希格斯玻色子的级联腐烂主导。在相反的层次结构中，当Yukawa耦合到Sm fermions时，沉重的希格斯的衰变会导致单一产生矢量夸克和瘦素。在任何情况下，我们都会探索由此产生的新型对撞机签名，并且目前的LHC未来运行的敏感性对新费米和重型希格斯的分支比率和分支比率。重要的是，我们讨论了签名的运动学挑战，并提出了可以在以后的分析中采用的战略可观察物。在II型2HDM的背景下，解释LHC的前瞻性覆盖率，我们发现在存在类似矢量的费米子的存在下，即使在低$ \tanβ$的情况下，也可以在HL-LHC上探索略高于2 TEV的重型Higgs Boson块。对于较重的希格斯（Higgs）在矢量般的瘦小面中腐烂，以$ \tanβ\ gtrsim 10 $延伸至3 tev略高于3 tev。此外，这些搜索策略意味着分别接近2.4 TEV和1.5 TEV的矢量式夸克和Lepton群众。本文部分基于参考文献。 [1-6]
In extensions of two Higgs doublet models with vectorlike quarks and leptons the decays of new scalars or fermions can be altered by the presence of the other, depending on the hierarchy of new physics. If new fermions are heavier than Higgses, their decays may be dominated by cascade decays through charged and neutral heavy Higgs bosons. In the opposite hierarchy, the decay of a heavy Higgs can lead to single production of vectorlike quarks and leptons when Yukawa couplings to SM fermions are present. We explore the resulting novel collider signatures in either case and present projected sensitivities of future runs of the LHC to the masses and branching ratios of new fermions and heavy Higgses. Importantly, we discuss kinematic challenges of the signatures and suggest strategic observables which could be adopted in future analyses. Interpreting the prospective reach of the LHC in the context of a type-II 2HDM, we find that in the presence of vectorlike fermions heavy Higgs boson masses slightly above 2 TeV can be explored at the HL-LHC even at low $\tanβ$. For heavy Higgs decays through vectorlike leptons, this reach extends to slightly above 3 TeV for $\tanβ\gtrsim 10$. Further, these search strategies imply a reach for vectorlike quark and lepton masses close to 2.4 TeV and 1.5 TeV, respectively. This article is partly based on Refs. [1-6]
