Closing the Wedge: Search Strategies for Extended Higgs Sectors with Heavy Flavor Final States

الأصل · EN

We consider search strategies for an extended Higgs sector at the high-luminosity LHC14 utilizing multi-top final states. In the framework of a Two Higgs Doublet Model, the purely top final states (t t, 4t) are important channels for heavy Higgs bosons with masses in the wedge above 2mₜ and at low values of β, while a 2 b 2t final state is most relevant at moderate values of β. We find, in the t t H channel, with H → t t, that both single and 3 lepton final states can provide statistically significant constraints at low values of β for mₐ as high as 750 GeV. When systematics on the t t background are taken into account, however, the 3 lepton final state is more powerful, though the precise constraint depends fairly sensitively on lepton fake rates. We also find that neither 2b2t nor t t final states provide constraints on additional heavy Higgs bosons with couplings to tops smaller than the top Yukawa due to expected systematic uncertainties in the t t background.