Leptogenesis in the minimal gauged U(1)${}_{L_{\mu }-L_{\tau }}$ model and the sign of the cosmological baryon asymmetry

Abstract

The minimal gauged U(1)${}_{L_{\mu }-L_{\tau }}$ model is a simple extension of the Standard Model and has a strong predictive power for the neutrino sector. In particular, the mass spectrum and couplings of heavy right-handed neutrinos are determined as functions of three neutrino Dirac Yukawa couplings, with which we can evaluate the baryon asymmetry of the Universe generated through their decay, i.e., leptogenesis. In this letter, we study leptogenesis in the minimal gauged U(1)${}_{L_{\mu }-L_{\tau }}$ model. It turns out that the sign of the resultant baryon asymmetry for the case with the Dirac CP phase, $\delta$, larger than $\pi$ is predicted to be opposite to that for $\delta <\pi$. In addition, if lepton asymmetry is dominantly produced by the decay of the lightest right-handed neutrino, then the correct sign of baryon asymmetry is obtained for $\delta >\pi$, which is favored by the current neutrino-oscillation experiments, whilst the wrong sign is obtained for $\delta <\pi$. We further investigate a non-thermal leptogenesis scenario where the U(1)${}_{L_{\mu }-L_{\tau }}$ breaking field plays the role of inflaton and decays into right-handed neutrinos, as a concrete example. It is found that this simple framework offers a successful inflation that is consistent with the CMB observation. We then show that the observed amount of baryon asymmetry can be reproduced in this scenario, with its sign predicted to be positive in most of the parameter space.

arXiv comment21 pages, 5 figures

References in corpus (58)

• Search for Majorana Neutrinos near the Inverted Mass Hierarchy Region with KamLAND-Zen
• CP violating decays in leptogenesis scenarios
• Global analysis of three-flavour neutrino oscillations: synergies and tensions in the determination of theta_23, delta_CP, and the mass ordering
• Universality Class in Conformal Inflation
• Superconformal Inflationary $\alpha$-Attractors
• Largest temperature of the radiation era and its cosmological implications
• How long before the end of inflation were observable perturbations produced?
• European Pulsar Timing Array Limits On An Isotropic Stochastic Gravitational-Wave Background
• Gravitational waves from binary supermassive black holes missing in pulsar observations
• Baryogenesis from a Lepton Asymmetric Universe
• Minimal Supergravity Models of Inflation
• Production of massive particles during reheating
• The NANOGrav 11-year Data Set: Pulsar-timing Constraints On The Stochastic Gravitational-wave Background
• Cosmological Sign of Neutrino CP Violation
• The Unity of Cosmological Attractors
• Constraint on the Matter-Antimatter Symmetry-Violating Phase in Neutrino Oscillations
• Addressing the LHC flavour anomalies with horizontal gauge symmetries
• Global constraints on absolute neutrino masses and their ordering
• Unitarity of the Leptonic Mixing Matrix
• The NANOGrav Nine-year Data Set: Limits on the Isotropic Stochastic Gravitational Wave Background
• CP Asymmetry in Majorana Neutrino Decays
• Production of Massive Fermions at Preheating and Leptogenesis
• Non-Thermal Phase Transitions after Inflation
• Probing the gravitational wave background from cosmic strings with LISA
• Leptogenesis in Inflaton Decay
• Flaxion: a minimal extension to solve puzzles in the standard model
• CP-violation from non-unitary leptonic mixing
• Leptogenesis in Inflationary Universe
• New limits on cosmic strings from gravitational wave observation
• Gravitational-wave cosmology across 29 decades in frequency
• Model for a Light Z' Boson
• Cosmological Parameters and Neutrino Masses from the Final Planck and Full-Shape BOSS Data
• Beyond the Standard Models with Cosmic Strings
• Updated results on neutrino mass and mass hierarchy from cosmology with Planck 2018 likelihoods
• Testing Seesaw and Leptogenesis with Gravitational Waves
• Minimal Scenarios for Leptogenesis and CP Violation
• On the Connection of Leptogenesis with Low Energy CP Violation and LFV Charged Lepton Decays
• Running Kinetic Inflation
• Vanishing Minors in the Neutrino Mass Matrix from Abelian Gauge Symmetries
• Predictions of the most minimal see-saw model
• Discovery probability of next-generation neutrinoless double-$\beta$ decay experiments
• Probing the scale of grand unification with gravitational waves
• A Flavor Symmetry for quasi-degenerate Neutrinos: L_mu-L_tau
• Zeros of the inverted neutrino mass matrix
• Stochastic gravitational waves from cosmic string loops in scaling
• Linear Inflation from Running Kinetic Term in Supergravity
• Natural Chaotic Inflation in Supergravity and Leptogenesis
• Zero minors of the neutrino mass matrix
• Phenomenological implications of neutrinos in extra dimensions
• Muon g-2 and LHC phenomenology in the $L_{\mu }-L_{\tau }$ gauge symmetric model
• Minimal Gauged U(1)${}_{L_{\alpha }-L_{\beta }}$ Models Driven into a Corner
• Predictions for the neutrino parameters in the minimal gauged U(1)${}_{L_{\mu }-L_{\tau }}$ model
• Non-unitary Leptonic Mixing and Leptogenesis
• On the possibility of search for $L_{\mu }-L_{\tau }$ gauge boson at Belle-II and neutrino beam experiments
• Vortices on the Higgs Branch of the Seiberg-Witten Theory
• Predictions for the neutrino parameters in the minimal model extended by linear combination of U(1)${}_{L_e-L_{\mu }}$, U(1)${}_{L_{\mu }-L_{\tau }}$ and U(1)${}_{B-L}$ gauge symmetries
• Searching for scalar boson decaying into light $Z^{\prime }$ boson at collider experiments in $U(1{)}_{L_{\mu }-L_{\tau }}$ model
• Consequences of an Abelian $Z^{\prime }$ for neutrino oscillations and dark matter

Cited by in corpus (10)

• TeV Scale Resonant Leptogenesis with $L_{\mu }-L_{\tau }$ Gauge Symmetry in the Light of Muon $(g-2)$
• Maximally self-interacting dark matter: models and predictions
• Probing the $L_{\mu }$-$L_{\tau }$ Gauge Boson at the MUonE Experiment
• Probing New Physics in the Vector-like Lepton Model by Lepton Electric Dipole Moments
• Thermal Leptogenesis in the Minimal Gauged $U(1{)}_{L_{\mu }-L_{\tau }}$ Model
• Kinematical distributions of coherent neutrino trident production in gauged $L_{\mu }-L_{\tau }$ model
• Scalar Dark Matter with a $\mu \tau$ Flavored Mediator
• Gauged $U(1{)}_{L_{\mu }-L_{\tau }}$ Symmetry and two-zero Textures of Inverse Neutrino Mass Matrix in light of Muon ($g-2$)
• Prospects of five-dimensional $L_{\mu }-L_{\tau }$ gauge interactions in the light of elastic neutrino-electron scatterings: The scope of the DUNE near detector
• Muon Beam Dump Experiments probe five-dimensional nature of $U(1{)}_{L_{\mu }-L_{\tau }}$