Investigating the leptonic couplings of doubly charged scalars at the muon collider

Abstract

We study the lepton flavour conserving and violating couplings of a doubly charged scalar at a 3 TeV muon collider. Using a model independent Lagrangian, we analyse the electron electron, muon muon, and tau tau final states mediated by the doubly charged scalar to probe individual couplings to mu e, mu mu, and mu tau. We find that for a doubly charged scalar of mass greater than 1 TeV and order one couplings, we achieve high signal significance in these channels. We delineate the collider s sensitivity in the mass vs coupling plane, highlighting the extensive reach of the muon collider in probing these couplings far beyond the current experimental limits. We also propose an angular distribution variable to discriminate the exchange of a doubly charged scalar from that of a neutral scalar, which give identical signals.

28 pages, 16 figures, and 9 tables. Version accepted for publication in the Physical Review D journal

References in corpus (37)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• An Introduction to PYTHIA 8.2
• A search for a doubly-charged Higgs boson in pp collisions at sqrt(s) = 7 TeV
• Study of vector boson scattering and search for new physics in events with two same-sign leptons and two jets
• High Energy Leptonic Collisions and Electroweak Parton Distribution Functions
• Vector boson fusion at multi-TeV muon colliders
• Lepton Flavour Violating Decays tau to lll and mu to e gamma in the Higgs Triplet Model
• Technical design of the phase I Mu3e experiment
• Radiative Neutrino Mass, Dark Matter and Leptogenesis
• Search for anomalous production of prompt same-sign lepton pairs and pair-produced doubly charged Higgs bosons with $\sqrt{s}=8$ TeV $pp$ collisions using the ATLAS detector
• Search for lepton-flavor-violating tau-lepton decays to $\ell \gamma$ at Belle
• Revisiting Type-II see-saw: Present Limits and Future Prospects at LHC
• 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
• Type-II Seesaw Model and Multilepton Signatures at Hadron Colliders
• Type-II Seesaw Triplet Scalar Effects on Neutrino Trident Scattering
• Search for doubly charged Higgs boson production in multi-lepton final states using 139 fb${}^{-1}$ of proton-proton collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Simplest Radiative Dirac Neutrino Mass Models
• Optimal search reach for heavy neutral leptons at a muon collider
• Understanding the correlation between $(g-2{)}_{\mu }$ and $\mu \to e\gamma$ in the MSSM
• Universal Extra Dimensions, Radiative Returns and the Inverse Problem at a Linear e+e- Collider
• Doubly-charged Higgs Boson at Future Electron-Proton Collider
• Revealing the origin of neutrino masses through the Type II Seesaw mechanism at high-energy muon colliders
• Multi Higgs production via photon fusion at future multi-TeV muon colliders
• Beam Delivery and Beamstrahlung Considerations for Ultra-High Energy Linear Colliders
• Collider Signatures of a Scalar Leptoquark and Vector-like Lepton in Light of Muon Anomaly
• Vector-Like Top Quark Production via an Electroweak Dipole Moment at a Muon Collider
• Neutrino masses from new seesaw models: Low-scale variants and phenomenological implications
• Neutrino masses from new Weinberg-like operators: Phenomenology of TeV scalar multiplets
• Type-II see-saw at ${\mu }^{+}$${\mu }^{-}$ collider
• Radiative Origin of Fermion Mass Hierarchy in Left-Right Symmetric Theory
• Probing the Inert Doublet Model via Vector-Boson Fusion at a Muon Collider
• An Alternate Left-Right Symmetric Model with Dirac Neutrinos
• A hybrid seesaw model and hierarchical neutrino flavor structures based on $A_4$ symmetry
• Long-lived Sterile Neutrino Searches at Future Muon Colliders
• Lepton Flavor Violation: From Muon Decays to Muon Colliders
• Unconventional Searches for Exotic Particles at Future Lepton Colliders