New mechanism for Type-II seesaw dominance in SO(10) with low-mass Z-prime, RH neutrinos, and verifiable LFV, LNV, and proton decay

Abstract

Dominance of type-II seesaw mechanism for neutrino masses has attracted considerable attention because of a number of advantages. We show a novel approach to achieve Type-II seesaw dominance in non-supersymmetric $SO(10)$ grand unification where a low mass $Z^{\prime }$ boson and specific patterns of right-handed neutrino masses are predicted within the accessible energy range of the Large Hadron Collider. In spite of the high value of the seesaw scale, $M_{{\Delta }_L}\simeq 10^8-10^9$ GeV, the model predicts new dominant contributions to neutrino-less double beta decay in the $W_L-W_L$ channel close to the current experimental limits via exchanges of heavier singlet fermions used as essential ingredients of this model even when the light active neutrino masses are normally hierarchical or invertedly hierarchical. We obtain upper bounds on the lightest sterile neutrino mass $m_s\lesssim 3.0$ GeV, $2.0$ GeV, and $0.7$ GeV for normally hierarchical, invertedly hierarchical, and quasi-degenerate patterns of light neutrino masses, respectively. The underlying non-unitarity effects lead to lepton flavor violating decay branching ratios within the reach of ongoing or planned experiments and the leptonic CP-violation parameter nearly two orders larger than the quark sector. Some of the predicted values on proton lifetime for $p\to e^{+}{\pi }^0$ are found to be within the currently accessible search limits. Other aspects of model applications including leptogenesis etc. are briefly indicated.

44 pages, 16 figures, hep-ph, hep-ex.Section 8 on leptogenesis added; figures and references added

References in corpus (28)

• Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam
• Phase space factors for double-$\beta$ decay
• Right-Handed Neutrinos at LHC and the Mechanism of Neutrino Mass Generation
• Unitarity of the Leptonic Mixing Matrix
• Non-Standard Neutrino Interactions with Matter from Physics Beyond the Standard Model
• Minimal Flavour Seesaw Models
• Results from a search for the $0\nu \beta \beta$-decay of ${}^{130}Te$
• CP-violation from non-unitary leptonic mixing
• Direct Bounds on Electroweak Scale Pseudo-Dirac Neutrinos from $\sqrt{s}=8$ TeV LHC Data
• Electroweak scale seesaw and heavy Dirac neutrino signals at LHC
• Fermion masses and mixings in SO(10) models and the neutrino challenge to supersymmetric grand unified theories
• Gauging U(1) symmetries and the number of right-handed neutrinos
• Non-unitary neutrino mixing and CP violation in the minimal inverse seesaw model
• Minimal supergravity sneutrino dark matter and inverse seesaw neutrino masses
• Different SO(10) Paths to Fermion Masses and Mixings
• Minimal SO(10) splits supersymmetry
• Extended double seesaw model for neutrino mass spectrum and low scale leptogenesis
• Uncovering Multiple CP-Nonconserving Mechanisms of $\betabeta$-Decay
• CP violation in neutrino oscillations and new physics
• Phenomenology of the triplet seesaw mechanism with Gauge and Yukawa mediation of SUSY breaking
• Left-right models with light neutrino mass prediction and dominant neutrinoless double beta decay rate
• Neutrino Mixings and Leptonic CP Violation from CKM Matrix and Majorana Phases
• Low Intermediate Scales for Leptogenesis in Supersymmetric SO(10) Grand Unified Theories
• A direct link between neutrinoless double beta decay and leptogenesis in a seesaw model with $S_4$ symmetry
• Neutrino mass and low-scale leptogenesis in a testable SUSY SO(10) model
• Inverse see-saw, leptogenesis, observable proton decay and ${\Delta }_{\mathrm{R}}^{\pm \pm }$ in SUSY SO(10) with heavy W_R
• Flavor unification, dark matter, proton decay and other observable predictions with low-scale $S_4$ symmetry
• Light Z' in Heterotic String Standard-like Models

Cited by in corpus (12)

• Production of Heavy neutrino in next-to-leading order QCD at the LHC and beyond
• Jet substructure shedding light on heavy Majorana neutrinos at the LHC
• Reconciling $(g-2{)}_{\mu }$ and charged lepton flavour violating processes through a doubly charged scalar
• Neutrinoless Double Beta Decay in LRSM with Natural Type-II seesaw Dominance
• Standard Coupling Unification in SO(10), Hybrid Seesaw Neutrino Mass and Leptogenesis, Dark Matter, and Proton Lifetime Predictions
• A comparative study of $0\nu \beta \beta$ decay in symmetric and asymmetric left-right model
• Planck-scale induced left-right gauge theory at LHC and experimental tests
• High Scale Type-II Seesaw, Dominant Double Beta Decay within Cosmological Bound and Verifiable LFV Decays in SU(5)
• LHC probes of TeV-scale scalars in $\mathrm{SO}(10)$ grand unification
• Neutrino Mass, Coupling Unification, Verifiable Proton Decay, Vacuum Stability and WIMP Dark Matter in SU(5)
• Unification Predictions With or Without Supersymmetry
• Leptogenesis in an extended seesaw model with $U(1{)}_{B-L}$ symmetry