Axion-like particle inflation and dark matter
Abstract
In this paper, we propose a generalized natural inflation (GNI) model to study axion-like particle (ALP) inflation and dark matter (DM). GNI contains two additional parameters (n1, n2) in comparison with the natural inflation, that make GNI more general. The n1 build the connection between GNI and other ALP inflation model, n2 controls the inflaton mass. After considering the cosmic microwave background and other cosmological observation limits, the model can realize small-field inflation with a wide mass range, and the ALP inflaton considering here can serve as the DM candidate for certain parameter spaces.
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