Primordial GWs from universality classes of pseudo-scalar inflation

11th International LISA Symposium

Pieroni, M.^1

Laboratoire AstroParticule et Cosmologie (APC), Université Paris Diderot Paris Centre for Cosmological Physics (PCCP), Paris Cedex 13

F75205, France^1

关键词: Extract informations;    Gauge fields;    Ground-based detectors;    GW detectors;    Microphysics;    Primordial black holes;    Space-based detector;    Universality class;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/840/1/012033/pdf
DOI  :  10.1088/1742-6596/840/1/012033

来源: IOP

【 摘 要 】

In this contribution we discuss the possibility of generating an observable gravitational wave (GW) background by coupling a pseudo-scalar inflaton to some Abelian gauge fields. This analysis is performed by dividing inflationary models into universality classes. We find that of the most promising scenario is a Starobinsky-like model, which may lead to the generation of observational signatures both in upcoming CMB detectors as well as for direct GW detectors. The signal which can be produced in these models would both be observable in ground-based detectors, such as advanced LIGO, and in space-based detectors, such as LISA. The complementarity between the CMB and direct GW detection may be used to extract informations on the microphysics of inflation. Interestingly the mechanism discussed in this contribution may also be relevant for the generation of Primordial Black Holes (PBHs).