Leptogenesis Constraints on the Mass of Right-handed Gauge Bosons

Abstract

We discuss leptogenesis constraints on the mass of the right-handed $W$-boson ($W_R$) in a TeV-scale Left-Right seesaw model (LRSM) for neutrino masses. For generic Dirac mass of the neutrinos, i.e. with all Yukawa couplings $\lesssim 10^{-5.5}$, it has been pointed out that successful leptogenesis requires a lower bound of 18 TeV on the $W_R$ mass, pushing it beyond the reach of LHC. Such TeV-scale LRSM must, however, be parity-asymmetric for type-I seesaw to give the observed neutrino masses. This class of models can accommodate larger Yukawa couplings, which give simultaneous fits to charged-lepton and neutrino masses, by invoking either cancellations or specific symmetry-textures for Dirac ($M_D$) and Majorana ($M_N$) masses in the seesaw formula. We show that in this case, the leptogenesis bound on $M_{W_R}$ can be substantially weaker, i.e. $M_{W_R}\gtrsim 3$ TeV for $M_N\lesssim M_{W_R}$. This happens due to considerable reduction of the dilution effects from $W_R$-mediated decays and scatterings, while the washout effects due to inverse decays are under control for certain parameter ranges of the Yukawa couplings. We also show that this model is consistent with all other low energy constraints, such as lepton flavor violation and neutrinoless double beta decay. Thus, a discovery of the right-handed gauge bosons alone at the LHC will not falsify leptogenesis as the mechanism behind the matter-antimatter asymmetry in our Universe.

arXiv comment29 pages, 5 figures, 2 tables; some clarifications and references added; version accepted for publication in Phys. Rev. D

References in corpus (54)

• Leptogenesis
• Resonant Leptogenesis
• Leptogenesis for Pedestrians
• CP violating decays in leptogenesis scenarios
• CP Violation and Baryogenesis due to Heavy Majorana Neutrinos
• Baryogenesis via neutrino oscillations
• Results on neutrinoless double beta decay of 76Ge from GERDA Phase I
• The importance of flavor in leptogenesis
• Baryogenesis from a Lepton Asymmetric Universe
• Flavour Issues in Leptogenesis
• Electroweak-Scale Resonant Leptogenesis
• Limit on Neutrinoless ββ Decay of Xe-136 from the First Phase of KamLAND-Zen and Comparison with the Positive Claim in Ge-76
• Flavour Matters in Leptogenesis
• Left-Right Symmetry at LHC
• Resonant CP violation induced by particle mixing in transition amplitudes
• Left-Right Symmetry: from LHC to Neutrinoless Double Beta Decay
• General CP Violation in Minimal Left-Right Symmetric Model and Constraints on the Right-Handed Scale
• The GERDA experiment for the search of 0νββ decay in ^{76}Ge
• 130Te Neutrinoless Double-Beta Decay with CUORICINO
• Flavor effects on leptogenesis predictions
• Leptonic CP violation
• Muon conversion to electron in nuclei in type-I seesaw models
• Neutrinoless Double Beta Decay within QRPA with Proton-Neutron Pairing
• Flavour Covariant Transport Equations: an Application to Resonant Leptogenesis
• New Production Mechanism for Heavy Neutrinos at the LHC
• Lepton number and flavour violation in TeV-scale left-right symmetric theories with large left-right mixing
• Protecting the Primordial Baryon Asymmetry From Erasure by Sphalerons
• Double beta decay in left-right symmetric models
• The EXO-200 detector, part I: Detector design and construction
• The mu - e Conversion in Nuclei, mu --> e gamma, mu --> 3e Decays and TeV Scale See-Saw Scenarios of Neutrino Mass Generation
• Natural TeV-Scale Left-Right Seesaw for Neutrinos and Experimental Tests
• Leptogenesis in the Universe
• Probing Heavy-Light Neutrino Mixing in Left-Right Seesaw Models at the LHC
• Radiatively induced leptogenesis in a minimal seesaw model
• Constraining Neutrino Mass from Neutrinoless Double Beta Decay
• Lepton Flavour Violation and theta(13) in Minimal Resonant Leptogenesis
• Re-Examination of Generation of Baryon and Lepton Number Asymmetries by Heavy Particle Decay
• Falsifying High-Scale Leptogenesis at the LHC
• Resonant CP Violation due to Heavy Neutrinos at the LHC
• On the Impact of Flavour Oscillations in Leptogenesis
• The minimal scenario of leptogenesis
• Leptogenesis with TeV Scale Inverse Seesaw in SO(10)
• Signal of Right-Handed Charged Gauge Bosons at the LHC?
• Lepton Number Violation and W' Chiral Couplings at the LHC
• Multiple CP Non-conserving Mechanisms of $\betabeta$-Decay and Nuclei with Largely Different Nuclear Matrix Elements
• Enlarging the window for radiative leptogenesis
• Charged Lepton Flavour Violation in Supersymmetric Low-Scale Seesaw Models
• Is leptogenesis falsifiable at LHC?
• Probing Resonant Leptogenesis at the LHC
• Electroweak Resonant Leptogenesis in the Singlet Majoron Model
• On neutrinoless double beta decay in the minimal left-right symmetric model
• Scalar triplet flavored leptogenesis: a systematic approach
• Gauge dilution and leptogenesis
• Flavoured CP asymmetries for type II seesaw leptogenesis

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