Leptogenesis and composite heavy neutrinos with gauge mediated interactions

Abstract

Leptogenesis is an appealing framework to account for the baryon asymmetry in the universe. To this end physics beyond the Standard Model is demanded. In this paper we investigate the possibility to attain successful leptogenesis with composite Majorana neutrinos. We work in the framework of effective gauge mediated and contact interactions without any reference to an underlying compositeness theory. This approach is the one adopted in all current experimental searches for composite fermions at colliders. In the case of gauge mediated interactions, we calculate the CP asymmetry in heavy composite neutrino decays. Both the direct and indirect CP asymmetry are derived and resonant leptogenesis is also discussed. We find that the Sakharov conditions can be met and, for some choice of the parameters, the correct order of magnitude of the baryon asymmetry is reproduced.

arXiv comment26 pages, 7 figures, references updated

References in corpus (39)

• Oscillating neutrinos and mu --> e, gamma
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Power Spectra and WMAP-Derived Parameters
• Leptogenesis
• The $\nu$MSM, Dark Matter and Baryon Asymmetry of the Universe
• Resonant Leptogenesis
• Leptogenesis for Pedestrians
• Towards a complete theory of thermal leptogenesis in the SM and MSSM
• CP violating decays in leptogenesis scenarios
• CP Violation and Baryogenesis due to Heavy Majorana Neutrinos
• Leptogenesis as the origin of matter
• Baryogenesis via neutrino oscillations
• The Electroweak Phase Transition: A Non-Perturbative Analysis
• The importance of flavor in leptogenesis
• The Sphaleron Rate in the Minimal Standard Model
• Standard Model CP-violation and Baryon asymmetry Part II: Finite Temperature
• Axions as Dark Matter Particles
• The Phenomenology of Right Handed Neutrinos
• CP Asymmetry in Majorana Neutrino Decays
• Heavy Majorana Neutrinos and Baryogenesis
• Baryon Asymmetry, Neutrino Mixing and Supersymmetric SO(10) Unification
• Flavour Covariant Transport Equations: an Application to Resonant Leptogenesis
• Standard Model CP-violation and Baryon asymmetry Part I: Zero Temperature
• Standard Model thermodynamics across the electroweak crossover
• Leptogenesis from first principles in the resonant regime
• On Higgs and sphaleron effects during the leptogenesis era
• Quasi-Degenerate Neutrino Mass Spectrum, μ-> e + γDecay and Leptogenesis
• Effective Theory of Resonant Leptogenesis in the Closed-Time-Path Approach
• Kadanoff-Baym Approach to Flavour Mixing and Oscillations in Resonant Leptogenesis
• The minimal scenario of leptogenesis
• CP violation in scatterings, three body processes and the Boltzmann equations for leptogenesis
• The Complex-Mass Scheme and Unitarity in perturbative Quantum Field Theory
• An effective field theory for non-relativistic Majorana neutrinos
• Lepton Flavor Violating Process in Degenerate and Inverse-Hierarchical Neutrino Models
• Search for excited electrons and muons in sqrt(s)=8 TeV proton-proton collisions with the ATLAS detector
• Search for excited leptons in proton-proton collisions at sqrt(s) = 8 TeV
• Hunting for heavy composite Majorana neutrinos at the LHC
• CP asymmetry in heavy Majorana neutrino decays at finite temperature: the hierarchical case
• Composite Neutrinos and Double Beta Decay
• Baryogenesis from leptomesons

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• Leptogenesis from composite singlets