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

Summary, in English

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.

• Author: José Eliel Camargo-Molina; Tanumoy Mandal; Roman Pasechnik; Jonas Wessén
• Department/s: Department of Astronomy and Theoretical Physics - Has been reorganised
• Publishing year: 2018-03-01
• Language: English
• Publication/Series: Journal of High Energy Physics
• Volume: 2018
• Issue: 3
• Links: http://dx.doi.org/10.1007/JHEP03(2018)024
• Document type: Journal article
• Publisher: Springer
• Topic: Subatomic Physics
• Keywords: Beyond Standard Model; Higgs Physics; Quark Masses and SM Parameters
• Status: Published
• ISBN/ISSN/Other: ISSN: 1029-8479