LHC Phenomenology of Type II Seesaw: Nondegenerate Case

Abstract

In this paper, we thoroughly investigate the LHC phenomenology of the type II seesaw mechanism for neutrino masses in the nondegenerate case where the triplet scalars of various charge ($H^{\pm \pm },H^{\pm },H^0,A^0$) have different masses. Compared with the degenerate case, the cascade decays of scalars lead to many new, interesting signal channels. In the positive scenario where $M_{H^{\pm \pm }}<M_{H^{\pm }}<M_{H^0/A^0}$, the four-lepton signal is still the most promising discovery channel for the doubly-charged scalars $H^{\pm \pm }$. The five-lepton signal is crucial to probe the mass spectrum of the scalars, for which, for example, a $5\sigma$ reach at 14 TeV LHC for $M_{H^{\pm }}=430GeV$ with $M_{H^{\pm \pm }}=400GeV$ requires an integrated luminosity of 76/fb. And the six-lepton signal can be used to probe the neutral scalars $H^0/A^0$, which are usually hard to detect in the degenerate case. In the negative scenario where $M_{H^{\pm \pm }}>M_{H^{\pm }}>M_{H^0/A^0}$, the detection of $H^{\pm \pm }$ is more challenging, when the cascade decay $H^{\pm \pm }\to H^{\pm }{W}^{\pm \ast }$ is dominant. The most important channel is the associated $H^{\pm }{H}^0/A^0$ production in the final state ${\ell }^{\pm }{\cancel{E}}_{T}b\bar{b}b\bar{b}$, which requires a luminosity of 109/fb for a $5\sigma$ discovery, while the final state ${\ell }^{\pm }{\cancel{E}}_{T}b\bar{b}{\tau }^{+}{\tau }^{-}$ is less promising. Moreover, the associated $H^0{A}^0$ production can give same signals as the standard model Higgs pair production. With a much larger cross section, the $H^0{A}^0$ production in the final state $b\bar{b}{\tau }^{+}{\tau }^{-}$ could reach $3\sigma$ significance at 14 TeV LHC with a luminosity of 300/fb. In summary, with an integrated luminosity of order 500/fb, the triplet scalars can be fully reconstructed at 14 TeV LHC in the negative scenario.

41 pages, 20 figures, 7 tables. Version 2 accepted by PRD. 41 pages, 18 figures. Main changes are, (1) rewording in secs III and IV, removing 2 figs and quoting ref [34]; (2) a paragraph added before eq (10) to clarify constraints from electroweak precision data; (3) a paper added to ref [11]. No changes in results

References in corpus (54)

• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Implications of CTEQ global analysis for collider observables
• FeynRules - Feynman rules made easy
• Search for Neutral MSSM Higgs Bosons at LEP
• MadAnalysis 5, a user-friendly framework for collider phenomenology
• Global status of neutrino oscillation parameters after Neutrino-2012
• Observation of the diphoton decay of the Higgs boson and measurement of its properties
• Right-Handed Neutrinos at LHC and the Mechanism of Neutrino Mass Generation
• Search for Neutrinoless Double-Beta Decay in ${}^{136}$Xe with EXO-200
• Distinguishing seesaw models at LHC with multi-lepton signals
• Low energy effects of neutrino masses
• Measurement of Higgs boson production in the diphoton decay channel in $pp$ collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector
• Neutrino Masses and the LHC: Testing Type II Seesaw
• Neutrino mass, Dark Matter and Baryon Asymmetry via TeV-Scale Physics without Fine-Tuning
• Signatures for Majorana neutrinos at hadron colliders
• Neutrino mass from Cosmology
• Heavy neutrino signals at large hadron colliders
• A search for a doubly-charged Higgs boson in pp collisions at sqrt(s) = 7 TeV
• Type-III see-saw at LHC
• A Survey of Lepton Number Violation Via Effective Operators
• Pair Production of Doubly-Charged Scalars: Neutrino Mass Constraints and Signals at the LHC
• Direct Bounds on Electroweak Scale Pseudo-Dirac Neutrinos from $\sqrt{s}=8$ TeV LHC Data
• New Physics in LHC Higgs boson pair production
• Vacuum Stability, Perturbativity, EWPD and Higgs-to-diphoton rate in Type II Seesaw Models
• A Model of TeV Scale Physics for Neutrino Mass, Dark Matter and Baryon Asymmetry and its Phenomenology
• Standard Model Higgs boson pair production in the $(b\bar{b})(b\bar{b})$ final state
• Lepton Flavour Violating Decays tau to lll and mu to e gamma in the Higgs Triplet Model
• 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
• Higgs pair production via gluon fusion in the Two-Higgs-Doublet Model
• Renormalizable Adjoint SU(5)
• Testability of Type I Seesaw at the CERN LHC: Revealing the Existence of the B-L Symmetry
• 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
• Higgs boson pair production in new physics models at hadron, lepton, and photon colliders
• Leptonic signatures of doubly charged Higgs boson production at the LHC
• A Three-Loop Model of Neutrino Mass with Dark Matter
• Lepton Number Violation and W' Chiral Couplings at the LHC
• Bounds on the mass of doubly-charged Higgs bosons in the same-sign diboson decay scenario
• On the Origin of Neutrino Masses
• Testing a Neutrino Mass Generation Mechanism at the Large Hadron Collider
• Multiple seesaw mechanisms of neutrino masses at the TeV scale
• NMSSM and Seesaw Physics at LHC
• Same-Sign Tetra-Leptons from Type II Seesaw
• Top Partners and Higgs Boson Production
• Double Type-II Seesaw, Baryon Asymmetry and Dark Matter for Cosmic e^\pm Excesses
• Cascade Seesaw for Tiny Neutrino Mass
• Unique Neutrino Mass Operator at any Mass Dimension
• Phenomenology in Minimal Cascade Seesaw for Neutrino Mass
• Double Higgs production at LHC, see-saw type II and Georgi-Machacek model
• Degenerate Higgs bosons decays to $\gamma \gamma$ and $Z\gamma$ in the type II Seesaw Model
• Search for a light fermiophobic Higgs boson produced via gluon fusion at Hadron Colliders
• Lepton Number Violation from Colored States at the LHC

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