CMB constraints on inflection-point inflation with a pseudo-scalar dark matter
Jamerson G. RodriguesVin\'icius OliveiraRodrigo von MarttensCarlos A. de S. PiresJailson Alcaniz
Jamerson G. RodriguesVin\'icius OliveiraRodrigo von MarttensCarlos A. de S. PiresJailson Alcaniz
Sep 2023
0被引用
0笔记
开学季活动火爆进行中，iPad、蓝牙耳机、拍立得、键盘鼠标套装等你来拿
摘要原文
In this work, we investigate the physical aspects of the inflection-point inflation scenario and assess its observational viability in light of current Cosmic Microwave Background (CMB) data. The model we consider encapsulates the inflaton with a pseudo-scalar (the dark matter candidate) in a complex neutral scalar singlet. The cosmological constraints on the parameters of inflation derived at a high energy scale are translated to a low energy scale by running these parameters. Ensuring the entire Lagrangian to be invariant under a $Z_3$ symmetry with the adequate transformation of the fields, the imaginary part of the singlet decouples from the other scalars of the model. We then investigate if the observational viability of inflation is also compatible with this pseudo-scalar being the dark matter component. We show that the CMB constraints on the inflationary parameters assure that the pseudo-scalar is stable and provides the correct relic dark matter abundance, regardless of whether it is thermally or non-thermally produced.
