Thermal leptogenesis and gauge mediation

2003/09/08 by Masaaki Fujii, M. Fujii, M. Ibe +1 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Electron #Gravitino #Inflation (cosmology) #Leptogenesis #Lepton #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Supergravity #Supersymmetry #Supersymmetry breaking #Theoretical physics #hep-ph

paper · pdf · doi:10.1103/physrevd.69.015006

published as Phys.Rev. D69 (2004) 015006 · 18 pages, including 1 tables and 7 figures

arxiv created 2003/09/08 · openalex publication_date 2004/01/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We show that a minithermal inflation occurs naturally in a class of gauge mediation models of supersymmetry (SUSY) breaking, provided that the reheating temperature T_R of the primary inflation is much higher than the SUSY-breaking scale, say T_R>10¹⁰GeV. The reheating process of the thermal inflation produces an amount of entropy, which dilutes the number density of relic gravitinos. This dilution renders the gravitino to be the dark matter in the present Universe. The abundance of the gravitinos is independent of the reheating temperature T_R, once the gravitinos are thermally produced after the reheating of the primary inflation. We find that the thermal leptogenesis takes place at T_L\ensuremath≃10¹²--10¹⁴GeV for m_3/2\ensuremath≃100keV--10MeV without any gravitino problem.

Citations

• Primordial nucleosynthesis and hadronic decay of a massive particle with a relatively short lifetime
• Reheating stage after inflation
• Cosmological moduli problem and thermal inflation models
• New tools for low energy dynamical supersymmetry breaking
• Gravitational field of vacuum domain walls and strings

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