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

Abstract

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 ($t\bar{t},4t$) are important channels for heavy Higgs bosons with masses in the wedge above $2m_t$ and at low values of $\tan \beta$, while a $2b2t$ final state is most relevant at moderate values of $\tan \beta$. We find, in the $t\bar{t}H$ channel, with $H\to t\bar{t}$, that both single and 3 lepton final states can provide statistically significant constraints at low values of $\tan \beta$ for $m_A$ as high as $\sim 750$ GeV. When systematics on the $t\bar{t}$ 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 $t\bar{t}$ 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 $t\bar{t}$ background.

Added a Fig. and updated references. Matches journal version. 31 pages, 11 figures

References in corpus (9)

• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• MCFM for the Tevatron and the LHC
• Echoes of the Electroweak Phase Transition: Discovering a second Higgs doublet through $A_0\to H_{0}Z$
• Constraining BSM Physics at the LHC: Four top final states with NLO accuracy in perturbative QCD
• Complementarity Between Non-Standard Higgs Searches and Precision Higgs Measurements in the MSSM
• Search for a 'stable alignment limit' in two Higgs-doublet models
• Searches for supersymmetry based on events with b jets and four W bosons in pp collisions at 8 TeV
• Exotic Decays Of A Heavy Neutral Higgs Through HZ/AZ Channel

Cited by in corpus (37)

• Higgs boson potential at colliders: status and perspectives
• Status of the semileptonic $B$ decays and muon g-2 in general 2HDMs with right-handed neutrinos
• Four Tops for LHC
• Collider Signatures of Flavorful Higgs Bosons
• Searching for new scalar bosons via triple-top signature in $cg\to t{S}^0\to tt\bar{t}$
• Recommendations of the LHC Dark Matter Working Group: Comparing LHC searches for heavy mediators of dark matter production in visible and invisible decay channels
• Minimal renormalizable simplified dark matter model with a pseudoscalar mediator
• On NMSSM Higgs Search Strategies at the LHC and the Mono-Higgs Signature in Particular
• Two Higgs Doublets and a Complex Singlet: Disentangling the Decay Topologies and Associated Phenomenology
• Nucleation is More than Critical -- A Case Study of the Electroweak Phase Transition in the NMSSM
• The NMSSM is within Reach of the LHC: Mass Correlations & Decay Signatures
• Boosting to identify: pseudoscalar searches with di-leptonic tops
• Probing TeV scale Top-Philic Resonances with Boosted Top-Tagging at the High Luminosity LHC
• Interference Effects in $t\bar{t}$ Production at the LHC as a Window on New Physics
• Implications of Four-Top and Top-Pair Studies on Triple-Top Production
• Probing Electroweak Baryogenesis induced by extra bottom Yukawa coupling via EDMs and collider signatures
• The $tZH$ and $tZh$ production in 2HDM: Prospects for discovery at the LHC
• First shot of the smoking gun: probing the electroweak phase transition in the 2HDM with novel searches for $A\to ZH$ in ${\ell }^{+}{\ell }^{-}t\bar{t}$ and $\nu \nu b\bar{b}$ final states
• Dark Matter Phenomenology of SM and Enlarged Higgs Sectors Extended with Vector Like Leptons
• Natural Alignment in the Two Higgs Doublet Model
• CP violation effects in the diphoton spectrum of heavy scalars
• Determining the Quantum Numbers of Simplified Models in $t\bar{t}X$ production at the LHC
• LHC Dark Matter Working Group: Next-generation spin-0 dark matter models
• Resonant top pair searches at the LHC: a window to electroweak phase transition
• Bump-hunting in LHC ttbar events
• Probing an additional bottom Yukawa coupling via $bg\to bA\to bZH$ signature
• Four top final states with NLO accuracy in perturbative QCD: 4 lepton channel
• A Final Word on FCNC-Baryogenesis from Two Higgs Doublets
• Dynamical Higgs Field Alignment in the NMSSM
• Higgs interference effects in top-quark pair production in the 1HSM
• Benchmark Suggestions for Resonant Double Higgs Production at the LHC for Extended Higgs Sectors
• Probing a ${\mathrm{Z}}^{\prime }$ with non-universal fermion couplings through top quark fusion, decays to bottom quarks, and machine learning techniques
• Prospect and implications of $cg\to b{H}^{+}\to bA{W}^{+}$ production at the LHC
• ttbb as a probe of New Physics at the LHC
• Scalar production and decay to top quarks including interference effects at NLO in QCD in an EFT approach
• Constraining scalar resonances with top-quark pair production at the LHC
• Probing Compressed Mass Spectrum Supersymmetry at the LHC with the Vector Boson Fusion Topology