Heavy charged scalars from $c\bar{s}$ fusion: A generic search strategy applied to a 3HDM with $\mathrm{U}(1)\times \mathrm{U}(1)$ family symmetry

Abstract

We describe a class of three Higgs doublet models (3HDMs) with a softly broken $\mathrm{U}(1)\times \mathrm{U}(1)$ family symmetry that enforces a Cabibbo-like quark mixing while forbidding tree-level flavour changing neutral currents. The hierarchy in the observed quark masses is partly explained by a softer hierarchy in the vacuum expectation values of the three Higgs doublets. As a consequence, the physical scalar spectrum contains a Standard Model (SM) like Higgs boson $h_{125}$ while exotic scalars couple the strongest to the second quark family, leading to rather unconventional discovery channels that could be probed at the Large Hadron Collider. In particular, we describe a search strategy for the lightest charged Higgs boson $H^{\pm }$, through the process $c\bar{s}\to H^{+}\to W^{+}{h}_{125}$, using a multivariate analysis that leads to an excellent discriminatory power against the SM background. Although the analysis is applied to the proposed class of 3HDMs, we employ a model-independent formulation such that it can be applied to any other model with the same discovery channel.

30 pages, 7 figures, extended references and added clarifications in the model section. Added Fig. 7 and relevant discussion on the distribution of parameter points in the scan results. Fixed typos and misspellings. Published version

References in corpus (8)

• 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
• The oblique parameters in multi-Higgs-doublet models
• Symmetry breaking patterns in 3HDM
• \sqrt{s}_min: a global inclusive variable for determining the mass scale of new physics in events with missing energy at hadron colliders
• Charged Higgs boson in the $W^{\pm }$ Higgs channel at the Large Hadron Collider
• Exploring a heavy charged Higgs using jet substructure in a fully hadronic channel
• Boosting the charged Higgs search prospects using jet substructure at the LHC

Cited by in corpus (10)

• Alignment limit in three Higgs-doublet models
• Differential Effects of Sequence-Local versus Nonlocal Charge Patterns on Phase Separation and Conformational Dimensions of Polyampholytes as Model Intrinsically Disordered Proteins
• HHH Whitepaper
• Multi-Higgs-Doublet Models and Singular Alignment
• Prospects of light charged scalars in a three Higgs doublet model with $Z_3$ symmetry
• Solving the fermionic mass hierarchy of the standard model
• Type-I thermal leptogenesis in $Z_3$-symmetric three Higgs doublet model
• evortran: a modern Fortran package for genetic algorithms with applications from LHC data fitting to LISA signal reconstruction
• Scalar and gauge sectors in the 3-Higgs Doublet Model under the S3-symmetry
• The Deconstruction of Flavor in the Privately Democratic Higgs Sector