Testing the Realistic Seesaw Model with Two Heavy Majorana Neutrinos at the CERN Large Hadron Collider

Abstract

In the conventional type-(I+II) seesaw model, the effective mass matrix of three known light neutrinos is given by M_nu = M_L - M_D M^{-1}_R M^T_D in the leading-order approximation. We propose an intriguing scenario, in which the structural cancellation condition M_D M^{-1}_R M^T_D = 0 is guaranteed by the A_4 x Z_2 flavor symmetry. As a consequence, neutrino masses are mainly generated by the Higgs triplet M_nu = M_L, while the neutrino mixing matrix is non-unitary and takes on the nearly tri-bimaximal pattern. A discriminating feature of this scenario from the pure type-II seesaw model is that the lepton-number-violating signatures induced by the heavy Majorana neutrinos can be discovered at the CERN Large Hadron Collider. We calculate the total cross section of the same-sign dilepton events pp to l^+(-)_alpha N_i to l^+(-)_alpha l^+(-)_beta jj (for i=1, 2 and alpha, beta = e, mu, tau), and emphasize the significant interference of the contributions from two different heavy Majorana neutrinos. The background from the standard model and the kinematic cuts used to reduce it have been considered. The possible way to distinguish between the signals from heavy Majorana neutrinos and those from doubly-charged Higgs bosons is briefly discussed.

18 pages, 3 figures, discussions about the SM background added, references updated. Accepted for publication in Phys. Lett. B

References in corpus (31)

• Right-Handed Neutrinos at LHC and the Mechanism of Neutrino Mass Generation
• Low energy effects of neutrino masses
• Neutrino Masses and the LHC: Testing Type II Seesaw
• Unitarity of the Leptonic Mixing Matrix
• Signatures for Majorana neutrinos at hadron colliders
• CP-violation from non-unitary leptonic mixing
• Heavy neutrino signals at large hadron colliders
• Pair Production of Doubly-Charged Scalars: Neutrino Mass Constraints and Signals at the LHC
• 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
• Tri-bimaximal Neutrino Mixing and Flavor-dependent Resonant Leptogenesis
• Neutrino Masses, Lepton Flavor Mixing and Leptogenesis in the Minimal Seesaw Model
• Testability of Type I Seesaw at the CERN LHC: Revealing the Existence of the B-L Symmetry
• Correlation between the Charged Current Interactions of Light and Heavy Majorana Neutrinos
• Predictive flavour symmetries of the neutrino mass matrix
• Direct determination of neutrino mass parameters at future colliders
• Probing non-unitary mixing and CP-violation at a Neutrino Factory
• Tri-bimaximal Neutrino Mixing from A(4) and θ_{13} \sim θ_C
• Testing non-unitarity of neutrino mixing matrices at neutrino factories
• Testing neutrino masses in little Higgs models via discovery of doubly charged Higgs at LHC
• Testing a Neutrino Mass Generation Mechanism at the Large Hadron Collider
• A Minimal Type II Seesaw Model
• Resonant leptogenesis and tribimaximal leptonic mixing with A4 symmetry
• Correlative signatures of heavy Majorana neutrinos and doubly-charged Higgs bosons at the Large Hadron Collider
• Deviations from Tri-bimaximal Neutrino Mixing in Type-II Seesaw and Leptogenesis
• A Compromise between Neutrino Masses and Collider Signatures in the Type-II Seesaw Model
• Neutrino masses, leptogenesis and dark matter in hybrid seesaw
• Tetra-maximal Neutrino Mixing and Its Implications on Neutrino Oscillations and Collider Signatures
• Two Higgs Doublet Type III Seesaw with mu-tau symmetry at LHC
• Same-sign single dilepton productions at the LHC
• Interference bands in decays of doubly-charged Higgs bosons to dileptons in the minimal type-II seesaw model at the TeV scale

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