Thermal leptogenesis in a 5D split fermion scenario with bulk neutrinos

2009/12/31 by J. Maalampi, Jukka Maalampi, Iiro Vilja +1
Mathematics · Physics and Astronomy · #Asymmetry #Baryon asymmetry #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Degenerate energy levels #Dimension (graph theory) #Fermion #Leptogenesis #Lepton #Mathematics #Neutrino #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Thermal #Thermodynamics #hep-ph

paper · pdf · doi:10.1103/physrevd.82.013009

published as Phys.Rev.D82:013009,2010 · 22 pages, 9 figures

openalex publication_date 2010/07/26 · arxiv created 2010/08/02 · arxiv updated 2014/11/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We study the thermal leptogenesis in a hybrid model, which combines the so-called split fermion model and the bulk neutrino model defined in five-dimensional spacetime. This model predicts the existence of a heavy neutrino pair nearly degenerate in mass, whose decays might generate a CP violation large enough for creating the baryon asymmetry of the Universe through leptogenesis. We investigate numerically the constraints this sets on the parameters of the model such as the size of the compactified fifth dimension.

Citations

• TASI 2006 Lectures on Leptogenesis
• CP asymmetry in Majorana neutrino decays
• Baryogenesis from mixed particle decays
• Hybrid model of neutrino masses and oscillations: Bulk neutrinos in the split-fermion scenario
• Neutrino flavor oscillations without flavor mixing angles
• First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Preliminary Maps and Basic Results
• The Hierarchy Problem and New Dimensions at a Millimeter
• First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Determination of Cosmological Parameters
• On anomalous electroweak baryon-number non-conservation in the early universe