Probing compressed mass spectra in the type-II seesaw model at the LHC

Abstract

Despite a great deal of effort in searching for the triplet-like Higgses in the type-II seesaw model, evidence for their production is yet to be found at the LHC. As such, one might be in the balance regarding this model's relevance at the electroweak scale. In this work, we peruse a scenario, akin to compressed mass spectra in Supersymmetry, which might have eluded the experimental searches thus far. We perform a multivariate analysis to distinguish signals with a pair of same-sign leptons with low invariant mass from the SM processes, including those accruing from fake leptons and electron charge misidentification, and find that a significant part of the hitherto unconstrained parameter space could be probed with the already collected Run 2 13 TeV LHC and future HL-LHC data.

10 pages (including references)

References in corpus (36)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• Vector boson pair production at the LHC
• Vector boson production at hadron colliders: a fully exclusive QCD calculation at NNLO
• ZZ production at hadron colliders in NNLO QCD
• Distinguishing seesaw models at LHC with multi-lepton signals
• Neutrino Masses and the LHC: Testing Type II Seesaw
• Evaluation of three methods for calculating statistical significance when incorporating a systematic uncertainty into a test of the background-only hypothesis for a Poisson process
• A search for a doubly-charged Higgs boson in pp collisions at sqrt(s) = 7 TeV
• Search for new phenomena in events with an energetic jet and missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Pair Production of Doubly-Charged Scalars: Neutrino Mass Constraints and Signals at the LHC
• Vacuum Stability, Perturbativity, EWPD and Higgs-to-diphoton rate in Type II Seesaw Models
• Study of vector boson scattering and search for new physics in events with two same-sign leptons and two jets
• Probing Majorana Phases and Neutrino Mass Spectrum in the Higgs Triplet Model at the LHC
• Neutrino mass hierarchy and Majorana CP phases within the Higgs triplet model at the LHC
• Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• 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
• Direct determination of neutrino mass parameters at future colliders
• Leptonic signatures of doubly charged Higgs boson production at the LHC
• Bounds on the mass of doubly-charged Higgs bosons in the same-sign diboson decay scenario
• Revisiting Type-II see-saw: Present Limits and Future Prospects at LHC
• LHC Phenomenology of Type II Seesaw: Nondegenerate Case
• 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
• LHC Run-I constraint on the mass of doubly charged Higgs bosons in the same-sign diboson decay scenario
• Same-Sign Tetra-Leptons from Type II Seesaw
• Search for supersymmetry in final states with two or three soft leptons and missing transverse momentum in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• W-boson mass in the triplet seesaw model
• Higgs triplets at like-sign linear colliders and neutrino mixing
• Doubly-charged Higgs Boson at Future Electron-Proton Collider
• NLO QCD + EW corrections to $ZZZ$ production with subsequent leptonic decays at LHC
• Low-mass doubly-charged Higgs bosons at LHC
• Type-II see-saw: searching the LHC elusive low-mass triplet-like Higgses at $e^{-}{e}^{+}$ colliders
• Revealing the origin of neutrino masses through the Type II Seesaw mechanism at high-energy muon colliders
• Testing the Scalar Triplet Solution to CDF's Fat $W$ Problem at the LHC
• Associated production of SM Higgs with a photon in type-II seesaw models at the ILC

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• $SU(2{)}_L$ triplet scalar as the origin of the 95 GeV excess?
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• Seeking a coherent explanation of LHC excesses for compressed spectra
• Hadron Collider Signatures of Lepton Number Violation in the Type II Seesaw Model
• Machine Learning Techniques for Intermediate Mass Gap Lepton Partner Searches at the Large Hadron Collider
• Precision Higgs Boson Probe of Type-II Seesaw Models
• Deciphering compressed electroweakino excesses with MadAnalysis 5
• Feasibility to probe the dynamical scotogenic model at the LHC