We discuss the possibility that inflation is driven by supersymmetry breaking with the superpartner of the goldstino (sgoldstino) playing the role of the inflaton. Imposing an R-symmetry allows to satisfy easily the slow-roll conditions, avoiding the so-called η-problem, and leads to an interesting class of small field inflation models, characterized by an inflationary plateau around the maximum of the scalar potential near the origin, where R-symmetry is restored with the inflaton rolling down to a minimum describing the present phase of the Universe. Inflation can be driven by either an F- or a D-term, while the minimum has a positive tuneable vacuum energy. The models agree with cosmological observations and in the simplest case predict a rather small tensor-to-scalar ratio of primordial perturbations.

中文翻译：

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弦和超对称宇宙学的挑战

我们讨论了暴胀是由超对称性破坏驱动的可能性，金斯提诺的超级伙伴（sgoldstino）扮演暴胀的角色。施加 R 对称可以轻松满足慢滚条件，避免所谓的η-problem，并导致了一类有趣的小场暴胀模型，其特征是在原点附近标量势的最大值附近出现暴胀高原，其中 R 对称性随着暴胀滚落到描述当前阶段的最小值而恢复。宇宙。通货膨胀可以由任一驱动F- 或D-term，而最小值具有正的可调真空能量。这些模型与宇宙学观察结果一致，并且在最简单的情况下预测了原始扰动的相当小的张量与标量比。