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arXiv 1402.5328hep-phastro-ph.CO
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从耦合到物质场的山顶暴胀和预暴胀

Hilltop inflation with preinflation from coupling to matter fields

Stefan Antusch, David Nolde, Stefano Orani

摘要:

我们提出了一类超对称山顶暴胀(也称为“新暴胀”)模型,其中靠近山顶的暴胀子的初始条件是通过“物质场预暴胀”产生的。这是通过暴胀子和物质场(即标准模型场或右手中微子)之间的耦合项来实现的。同样的耦合也为暴胀子进入标准模型场开辟了一条衰变通道,这使得宇宙能够有效地再加热。我们讨论了多场动力学的暴胀和物质领域在通货膨胀期间使用的三角洲N形式主义,并显示在何种条件下,该模型有效地减少到单场山顶通货膨胀在过去的60 e-折叠。我们还研究了通过物质-暴胀子耦合的微扰再加热的一个具体例子,其中的物质场被确定为右手(s)中微子,并证明在这种情况下,该模型可以产生所观察到的重子不对称性通过非热leptogenesis。

英文摘要:

We propose a class of models of supersymmetric hilltop inflation (also called "new inflation") where the initial conditions of the inflaton close to the hilltop are generated through "matter field preinflation". This is achieved via a coupling term between the inflaton and matter fields (i.e. Standard Model fields or a right-handed neutrino). The same coupling also opens up a decay channel for the inflaton into Standard Model fields, which allows efficient reheating of the universe. We discuss the multifield dynamics of the inflaton and matter fields during inflation using the delta N formalism and show under which conditions the model effectively reduces to single-field hilltop inflation during the last 60 e-folds. We also study perturbative reheating through the matter-inflaton coupling for a specific example where the matter field is identified with a right-handed (s)neutrino, and demonstrate that in this case the model can generate the observed baryon asymmetry through nonthermal leptogenesis.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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