Neutral and Doubly-Charged Scalars at Future Lepton Colliders

Abstract

Many new physics scenarios beyond the Standard Model (BSM) necessitate the existence of new neutral and/or charged scalar fields, which might couple to the SM charged leptons (but not hadrons), and thus, can give rise to BSM signals while evading strong constraints mostly coming from the hadronic sector. I show that future lepton colliders provide a clean environment to probe these leptophilic new scalars via multi-lepton final states, including some interesting lepton flavor violating (LFV) channels. I also study the kinematic distributions of the final state leptons to distinguish the BSM contributions from neutral and doubly-charged scalars giving rise to the same final state, as well as from the irreducible SM background.

References in corpus (28)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Theory and phenomenology of two-Higgs-doublet models
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm
• The anomalous magnetic moment of the muon in the Standard Model
• Measurement of the fine-structure constant as a test of the Standard Model
• Leading hadronic contribution to the muon magnetic moment from lattice QCD
• Higgs Boson Theory and Phenomenology
• New Bounds from Searching for Muonium to Antimuonium Conversion
• Single and Pair Production of Doubly Charged Higgs Bosons at Hadron Colliders
• Lattice calculation of the short and intermediate time-distance hadronic vacuum polarization contributions to the muon magnetic moment using twisted-mass fermions
• Window observable for the hadronic vacuum polarization contribution to the muon $g-2$ from lattice QCD
• New Physics Contributions to the Muon Anomalous Magnetic Moment: A Numerical Code
• Data-driven evaluations of Euclidean windows to scrutinize hadronic vacuum polarization
• Displaced vertex signatures of doubly charged scalars in the type-II seesaw and its left-right extensions
• Testing neutrino masses in little Higgs models via discovery of doubly charged Higgs at LHC
• Long Lived Light Scalars as Probe of Low Scale Seesaw Models
• Measurement and Interpretation of Fermion-Pair Production at LEP energies above the Z Resonance
• Doubly Charged Higgs Boson Production at Hadron Colliders
• Correlative signatures of heavy Majorana neutrinos and doubly-charged Higgs bosons at the Large Hadron Collider
• Doubly-Charged Scalars in the Type-II Seesaw Mechanism: Fundamental Symmetry Tests and High-Energy Searches
• Low- and high-energy phenomenology of a doubly charged scalar
• Improved stellar limits on a light CP-even scalar
• Probing TeV scale origin of neutrino mass at future lepton colliders via neutral and doubly-charged scalars
• Lepton identification at particle flow oriented detector for the future $e^{+}{e}^{-}$ Higgs factories
• Cosmological Constraints on Dark Scalar
• Discriminating the HTM and MLRSM models in collider studies via doubly charged Higgs boson pair production and the subsequent leptonic decays
• Enhancing $B_s\to e^{+}{e}^{-}$ to an Observable Level in the Two-Higgs-Doublet Model

Cited by in corpus (3)

• Precision Higgs Boson Probe of Type-II Seesaw Models
• Z and Higgs boson decays with doubly-charged scalars at one-loop: current constraints, future sensitivities, and application to lepton-triality models
• Linearly Polarized Photon Fusion as a Precision Probe of the Tau Lepton Dipole Moments at Lepton Colliders