Cosmic microwave background, matter–antimatter asymmetry and neutrino masses

2002/05/31 by W. Buchmüller, W. Buchmuller, Pasquale Di Bari +3 · 10 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #astro-ph #hep-ph #hep-th

paper · pdf · doi:10.1016/s0550-3213(02)00737-x

published as Nucl.Phys.B643:367-390,2002; Erratum-ibid.B793:362,2008 · 28 pages, 14 figures included; v2: erratum added, M_1 lower bound in the strong wash-out regime (see Eq. (63)) relaxed by a factor 2/3

openalex publication_date 2002/11/01 · arxiv created 2007/08/10 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study the implications of thermal leptogenesis for neutrino parameters. Assuming that decays of N₁, the lightest of the heavy Majorana neutrinos, initiate baryogenesis, we show that the final baryon asymmetry is determined by only four parameters: the CP asymmetry epsilon₁, the heavy neutrino mass M₁, the effective light neutrino mass m₁, and the quadratic mean m of the light neutrino masses. Imposing the CMB measurement of the baryon asymmetry as constraint on the neutrino parameters, we show, in a model independent way, that quasi-degenerate neutrinos are incompatible with thermal leptogenesis. For maximal CP asymmetry epsilon₁, and neutrino masses in the range from (Δm²_sol)^1/2 to (Δm²_atm)^1/2, the baryogenesis temperature is T_B = O(10¹⁰) GeV.

Citations

• Quantum mechanics of baryogenesis
• Neutrino masses from U(1) symmetries and the Super-Kamiokande data
• Baryogenesis through leptogenesis
• CP asymmetry in Majorana neutrino decays
• Multiple Peaks in the Angular Power Spectrum of the Cosmic Microwave Background: Significance and Consequences for Cosmology
• Spectator processes and baryogenesis
• On anomalous electroweak baryon-number non-conservation in the early universe
• Review of particle properties
• Review of Particle Physics

Cited by

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• Constraint onB–Lcosmic string from leptogenesis with degenerate neutrinos
• Scenarios of modulated perturbations
• Theory of neutrinos: a white paper
• Flavour covariant transport equations: An application to resonant leptogenesis
• A 3×2 texture for neutrino oscillations and leptogenesis
• Consequences of triplet seesaw for leptogenesis
• Resonant leptogenesis in the minimalB−Lextended standard model at TeV
• Neutrino oscillations v.s. leptogenesis in SO(10) models
• Radiatively induced leptogenesis in a minimal seesaw model
• Nonequilibrium dynamics of scalar fields in a thermal bath