Leptogenesis from a sneutrino condensate reexamined

2004/01/31 by Rouzbeh Allahverdi, Manuel Drees · 3 citations
Physics and Astronomy · #Asymmetry #Baryon asymmetry #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Leptogenesis #Lepton #Lepton number #MAJORANA #Minimal Supersymmetric Standard Model #Neutrino #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Supersymmetry #hep-ph

paper · pdf · doi:10.1103/physrevd.69.103522

published as Phys.Rev. D69 (2004) 103522 · 17 revtex pages, 3 figures, 1 table. Slightly modified and references added. Final version accepted for publication in Phys. Rev. D

arxiv created 2004/03/04 · openalex publication_date 2004/05/27 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We reexamine leptogenesis from a right-handed sneutrino condensate, paying special attention to the B term associated with the seesaw Majorana mass. This term generates a lepton asymmetry in the condensate whose time average vanishes. However, a net asymmetry will result if the sneutrino lifetime is not much longer than the period of oscillations. Supersymmetry breaking by thermal effects then yields a lepton asymmetry in the standard model sector after the condensate decays. We explore different possibilities by taking account of both the low-energy and Hubble B terms. It will be shown that the desired baryon asymmetry of the Universe can be obtained for a wide range of Majorana masses.

Citations

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Cited by

• Supersymmetric thermalization and quasi-thermal Universe: consequences for gravitinos and leptogenesis
• Neutrino masses, Baryon asymmetry, dark matter and the moduli problem — A complete framework
• Light Higgs boson scenario in the supersymmetric seesaw model