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Roman Pasechnik

Senior lecturer

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

Author

  • José Eliel Camargo-Molina
  • Tanumoy Mandal
  • Roman Pasechnik
  • Jonas Wessén

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.

Department/s

  • Department of Astronomy and Theoretical Physics

Publishing year

2018-03-01

Language

English

Publication/Series

Journal of High Energy Physics

Volume

2018

Issue

3

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