Search for doubly and singly charged Higgs bosons decaying into vector bosons in multi-lepton final states with the ATLAS detector using proton-proton collisions at $\sqrt{s}$ = 13 TeV

Abstract

A search for charged Higgs bosons decaying into $W^{\pm }{W}^{\pm }$ or $W^{\pm }Z$ bosons is performed, involving experimental signatures with two leptons of the same charge, or three or four leptons with a variety of charge combinations, missing transverse momentum and jets. A data sample of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider between 2015 and 2018 is used. The data correspond to a total integrated luminosity of 139 fb${}^{-1}$. The search is guided by a type-II seesaw model that extends the scalar sector of the Standard Model with a scalar triplet, leading to a phenomenology that includes doubly and singly charged Higgs bosons. Two scenarios are explored, corresponding to the pair production of doubly charged $H^{\pm \pm }$ bosons, or the associated production of a doubly charged $H^{\pm \pm }$ boson and a singly charged $H^{\pm }$ boson. No significant deviations from the Standard Model predictions are observed. $H^{\pm \pm }$ bosons are excluded at 95% confidence level up to 350 GeV and 230 GeV for the pair and associated production modes, respectively.

51 pages in total, author list starting page 36, 9 figures, 8 tables, submitted to JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2019-06/

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Cited by in corpus (36)

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• A 95 GeV Higgs Boson in the Georgi-Machacek Model
• Tripling down on the $W$ boson mass
• Muon $g-2$ in a two-Higgs-doublet model with a type-II seesaw mechanism
• Updated constraints on Georgi-Machacek model, and its electroweak phase transition and associated gravitational waves
• Unavoidable Higgs coupling deviations in the $Z_2$-symmetric Georgi-Machacek model
• Low-mass doubly-charged Higgs bosons at LHC
• Leptonic Scalars and Collider Signatures in a UV-complete Model
• Type-II see-saw: searching the LHC elusive low-mass triplet-like Higgses at $e^{-}{e}^{+}$ colliders
• Lepton Flavour Violation in minimal grand-unified type II seesaw models
• Testing the Scalar Triplet Solution to CDF's Fat $W$ Problem at the LHC
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• Testing tree level TeV scale seesaw scenarios in $\mu$TRISTAN
• New physics implications of VBF searches exemplified through the Georgi-Machacek model
• TeV Scale Modified Type-II Seesaw and Dark Matter in a Gauged $U(1{)}_{\mathrm{B}-\mathrm{L}}$ Symmetric Model
• Search for a light $Z^{\prime }$ at LHC in a neutrinophilic $U(1)$ model
• Dirac dark matter, dark radiation, and the type-II seesaw mechanism in alternative $U(1{)}_X$ standard model
• Confronting dark fermion with a doubly charged Higgs in the left-right symmetric model
• Type-II Majoron Dark Matter
• Charged Higgs decay to $W^{\pm }H$ at a high energy lepton collider
• Hadron Collider Signatures of Lepton Number Violation in the Type II Seesaw Model
• Non-Leptonic Decays of Bileptons
• Diphoton signals for the Georgi-Machacek scenario at the Large Hadron Collider
• Precision Higgs Boson Probe of Type-II Seesaw Models
• Testing type II seesaw leptogenesis at the LHC
• Seesaw Models under the Lens of Angular Distributions at ${\mu }^{+}{\mu }^{-},{\mu }^{+}{\mu }^{+},{\mu }^{+}\gamma$ and ${\mu }^{+}{e}^{-}$ Colliders
• Doubly charged Higgs boson at same-sign lepton colliders
• Exploring two component doublet dark matter
• Correlating neutrino magnetic moment and scalar triplet dark matter to enlighten XENONnT bounds in a Type-II model
• Charged Lepton Flavor Violation at the High-Energy Colliders: Neutrino Mass Relevant Particles
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