Hot Leptogenesis from Thermal Dark Matter

Abstract

In this work, we investigate a scenario in which heavy Majorana Right-Handed Neutrinos (RHNs) are in thermal equilibrium with a dark sector with temperature higher than the Standard Model (SM) thermal bath. Specifically, we consider the scenario in which thermal Dark Matter (DM) abundance is fixed from the freeze-out of DM annihilations into RHNs. Due to the inert nature of the RHNs, we show that it is possible for the two sectors to remain thermally decoupled by having more than two generations of the RHNs. The hotter temperature implies higher abundances of DM and RHNs with the following consequences. For leptogenesis, an enhancement in efficiency up to a factor of 51.6 can be obtained, though a resonant enhancement of CP violation is still required due to an upper mass bound of about 4 TeV for the RHNs. For the DM, an enhanced annihilation cross section up to a factor of 51.6 is required to obtain the correct DM abundance. This scenario can be probed via indirect detection of DM annihilating into RHNs, which then decay into $h\nu$, $Z\nu$ and $W^{\pm }{\ell }^{\mp }$ with an enhanced annihilation cross section above the typical thermal value.

arXiv comment29 pages, 11 figures. V2: version published in JCAP

References in corpus (75)

• Planck 2015 results. XIII. Cosmological parameters
• Oscillating neutrinos and mu --> e, gamma
• Leptogenesis
• Big Bang Nucleosynthesis: 2015
• A lower bound on the right-handed neutrino mass from leptogenesis
• Towards a complete theory of thermal leptogenesis in the SM and MSSM
• CP violating decays in leptogenesis scenarios
• Precise Relic WIMP Abundance and its Impact on Searches for Dark Matter Annihilation
• CP Violation and Baryogenesis due to Heavy Majorana Neutrinos
• The SIMP Miracle
• Baryogenesis via neutrino oscillations
• Updated fit to three neutrino mixing: exploring the accelerator-reactor complementarity
• Baryogenesis through leptogenesis
• The importance of flavor in leptogenesis
• Flavour Issues in Leptogenesis
• The Sphaleron Rate in the Minimal Standard Model
• The SIMPlest Miracle
• Flavour Matters in Leptogenesis
• Asymmetric Inflationary Reheating and the Nature of Mirror Universe
• Search for dark matter annihilations towards the inner Galactic halo from 10 years of observations with H.E.S.S
• Elastically Decoupling Dark Matter
• Production Regimes for Self-Interacting Dark Matter
• SIMP Spectroscopy
• Protecting the Primordial Baryon Asymmetry From Erasure by Sphalerons
• Thermal Dark Matter From A Highly Decoupled Sector
• Cannibal Dark Matter
• Dark Matter and Fundamental Physics with the Cherenkov Telescope Array
• Coherence of neutrino oscillations in the wave packet approach
• PeV-Scale Dark Matter as a Thermal Relic of a Decoupled Sector
• Soft Leptogenesis
• Leptogenesis from Supersymmetry Breaking
• $Z_2$ SIMP Dark Matter
• Unitarity Bounds and the Cuspy Halo Problem
• Systematic uncertainties in the determination of the local dark matter density
• Communication with SIMP dark mesons via Z'-portal
• A WIMPy Baryogenesis Miracle
• Search for Neutrinos from Dark Matter Self-Annihilations in the center of the Milky Way with 3 years of IceCube/DeepCore
• Phases of Cannibal Dark Matter
• WIMP and SIMP Dark Matter from the Spontaneous Breaking of a Global Group
• Simply split SIMPs
• Cosmic abundances of SIMP dark matter
• Sterile Neutrino portal to Dark Matter II: Exact Dark symmetry
• Results from the search for dark matter in the Milky Way with 9 years of data of the ANTARES neutrino telescope
• The Graininess of Dark Matter Haloes
• Phenomenology of ELDER Dark Matter
• Sterile neutrino portal to Dark Matter I: The $U(1{)}_{B-L}$ case
• SIMP model at NNLO in chiral perturbation theory
• Baryomorphosis: Relating the Baryon Asymmetry to the "WIMP Miracle"
• All-flavour Search for Neutrinos from Dark Matter Annihilations in the Milky Way with IceCube/DeepCore
• Search of Dark Matter Annihilation in the Galactic Centre using the ANTARES Neutrino Telescope
• Resonant SIMP dark matter
• Finite temperature effects on CP violating asymmetries
• Phenomenology of WIMPy baryogenesis models
• Dark Matter Production Mechanisms with a Non-Thermal Cosmological History - A Classification
• A framework for testing leptonic unitarity by neutrino oscillation experiments
• The Sensitivity of HAWC to High-Mass Dark Matter Annihilations
• WIMP miracle of the second kind
• Particle Dark Matter Constraints: the Effect of Galactic Uncertainties
• On thermal production of self-interacting dark matter
• Multipole analysis of IceCube data to search for dark matter accumulated in the Galactic halo
• Spectator Effects during Leptogenesis in the Strong Washout Regime
• On baryogenesis from dark matter annihilation
• Search for right-handed neutrinos from dark matter annihilation with gamma-rays
• Indirect searches of dark matter via polynomial spectral features
• Simultaneous Generation of WIMP Miracle-like Densities of Baryons and Dark Matter
• Leptogenesis from Soft Supersymmetry Breaking (Soft Leptogenesis)
• Helicitogenesis: WIMPy baryogenesis with sterile neutrinos and other realizations
• Gamma-ray Limits on Neutrino Lines
• Dark Matter Assimilation into the Baryon Asymmetry
• A Radiative Neutrino Mass Model with SIMP Dark Matter
• CP asymmetry in heavy Majorana neutrino decays at finite temperature: the hierarchical case
• Spherical Cows in Dark Matter Indirect Detection
• Systematic uncertainties from halo asphericity in dark matter searches
• CP asymmetry in heavy Majorana neutrino decays at finite temperature: the nearly degenerate case
• Sharing but not Caring: Dark Matter and the Baryon Asymmetry of the Universe

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• Primordial Gravitational Waves in Nonstandard Cosmologies
• Scalar singlet dark matter in non-standard cosmologies
• Phenomenology of Self-Interacting Dark Matter in a Matter-Dominated Universe
• Non-thermal Origin of Asymmetric Dark Matter from Inflaton and Primordial Black Holes
• Primordial Gravitational Wave Signals in Modified Cosmologies
• Rescuing High-Scale Leptogenesis using Primordial Black Holes
• Reconstructing Non-standard Cosmologies with Dark Matter
• WIMPs during Reheating
• From WIMPs to FIMPs with Low Reheating Temperatures
• Dark Matter and Leptogenesis from Gravitational Production
• Leptogenesis in fast expanding Universe
• Probing the sterile neutrino portal to Dark Matter with $\gamma$ rays
• From WIMPs to FIMPs: Impact of Early Matter Domination
• Unitarity Bound on Dark Matter in Low-temperature Reheating Scenarios
• Sterile Neutrino Portal Dark Matter in $\nu$THDM
• Hot Leptogenesis
• Cogenesis of visible and dark matter in a scotogenic model