Modular cosmology, thermal inflation, baryogenesis and a prediction for particle accelerators

Donghui Jeong, Wan Il Park, Ewan D. Stewart, Kenji Kadota

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Modular cosmology is plagued by overproduction of unwanted relics, gravitinos and especially moduli, at relatively low energy scales. Thermal inflation provides a compelling solution to this moduli problem, but invalidates most baryogenesis scenarios. We propose a simple model in which the MSSM plus neutrino mass term (LHu)2 is supplemented by a minimal flaton sector to drive the thermal inflation, and make two crucial assumptions: the flaton vacuum expectation value generates the μ-term of the MSSM and mL2 + mHu2 < 0. The second assumption is particularly interesting in that it violates a well known constraint, implying that there exists a nearby deep non-MSSM vacuum, and provides a clear signature of our model which can be tested at future particle accelerators. We show that our model leads to thermal inflation followed by Affleck-Dine leptogenensis along the LHu flat direction. A key feature of our leptogenesis scenario is that the HuHd flat direction is also induced to temporarily acquire a large value, playing a crucial role in the leptogenesis, as well as dynamically shielding the field configuration from the deep non-MSSM minimum, ensuring that the fields relax into our MSSM vacuum.

Original languageEnglish (US)
Pages (from-to)1227-1244
Number of pages18
JournalJournal of High Energy Physics
Issue number11
StatePublished - Nov 1 2004

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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