Modular Cosmology, Thermal Inflation, Baryogenesis and Predictions for Particle Accelerators

Donghui Jeong; Kenji Kadota; Wan-Il Park; Ewan D. Stewart

doi:10.1088/1126-6708/2004/11/046

paper

Modular Cosmology, Thermal Inflation, Baryogenesis and Predictions for Particle Accelerators

arXiv:hep-ph/0406136 · doi:10.1088/1126-6708/2004/11/046

Abstract

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 $(L H_{u})^{2}$ 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 $m_{L}^{2} + m_{H_{u}}^{2} < 0$ . 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 $L H_{u}$ flat direction. A key feature of our leptogenesis scenario is that the $H_{u} H_{d}$ 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.

arXiv commentv3; 19 pages, 3 figures; added a reference for section 1

Modular Cosmology, Thermal Inflation, Baryogenesis and Predictions for Particle Accelerators

Abstract

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