Heavy charged scalars from cs¯ fusion: a generic search strategy applied to a 3HDM with U(1) × U(1) family symmetry

Research output: Contribution to journalArticle


We describe a class of three Higgs doublet models (3HDMs) with a softly broken U(1) × 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 h125 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±, through the process cs¯ → H+→ W+h125, 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.


External organisations
  • Uppsala University
  • University of Delhi
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics


  • Beyond Standard Model, Higgs Physics, Quark Masses and SM Parameters
Original languageEnglish
Article number24
JournalJournal of High Energy Physics
Issue number3
Publication statusPublished - 2018 Mar 1
Publication categoryResearch

Related research output

Wessén, J., 2018, Lund: Lund University, Faculty of Science, Department of Astronomy and Theoretical Physics. 196 p.

Research output: ThesisDoctoral Thesis (compilation)

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