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arXiv 2305.00523hep-phastro-ph.COhep-th
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Starobinsky型B-L Higgs暴胀引领超越MSSM

Starobinsky-Type B-L Higgs Inflation Leading Beyond MSSM

C. Pallis

AI总结:

该研究在超引力框架下构建诱导引力暴胀模型,以Higgs场为暴胀子,通过U(1)_{B-L}对称性破缺和Starobinsky型势实现符合观测的暴胀,预言暴胀子质量约10^13 GeV,并关联MSSM解释μ参数及通过非热轻子生成实现重子生成。

摘要:

诱导引力暴胀模型在超引力框架下构建,以Higgs场作为暴胀子,该场在Mgut=2x10^16 GeV能标下引发U(1)_{B-L}对称性的自发破缺。我们采用由U(1)R对称性固定的可重整超势,以及具有整数前因子并展现出对引力二次非最小耦合的对数或半对数Kähler势。我们找到了符合观测的Starobinsky型暴胀解。暴胀子质量被预言为10^13 GeV量级。该模型可与MSSM巧妙关联,一致地解释了μ参数的大小与唯象数据。此外,若引力子质量大于约10 TeV,该模型还允许通过非热轻子生成机制实现重子生成。

英文摘要:

Models of induced-gravity inflation are formulated within Supergravity employing as inflaton the Higgs field which leads to a spontaneous breaking of a U(1)_{B-L} symmetry at Mgut=2x10^16 GeV. We use a renormalizable superpotential, fixed by a U(1) R symmetry, and logarithmic or semi-logarithmic Kahler potentials with integer prefactors which exhibit a quadratic non-minimal coupling to gravity. We find inflationary solutions of Starobinsky type in accordance with the observations. The inflaton mass is predicted to be of the order of 10^13 GeV. The model can be nicely linked to MSSM offering an explanation of the magnitude of the mu parameter consistently with phenomenological data. Also it allows for baryogenesis via non-thermal leptogenesis, provided that the gravitino is heavier than about 10 TeV.

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