#### Modular cosmology, thermal inflation, baryogenesis and a prediction for particle accelerators = 모듈리 우주론, 열적 초팽창, 중입자 생성 그리고 입자 가속기 실험에 대한 예측

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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 $(LH_u)^2$ is supplemented by a minimal flaton sector to drive the thermal inflation, and make two crucial assumptions: the flaton vacuum expectation value generates the $\\mu$-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 $LH_u$ flat direction. A key feature of our leptogenesis scenario is that the $H_uH_d$ 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.
Stewart, Ewan D.researcher스튜어트, 유안researcher
Description
한국과학기술원 : 물리학과,
Publisher
한국과학기술원
Issue Date
2006
Identifier
258064/325007  / 020015120
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 물리학과, 2006.8, [ v, 36 p. ]

Keywords

중입자 생성; 열적 초팽창; Thermal Inflation; Baryogenesis; 모듈리 우주론; Modular Cosmology

URI
http://hdl.handle.net/10203/47402