Probing non-Gaussian Stochastic Gravitational Wave Backgrounds with LISA

Understand

The stochastic gravitational wave background (SGWB) contains a wealth of information on astrophysical and cosmological processes.

• A major challenge of upcoming years will be to extract the information contained in this background and to disentangle the contributions of different sources.
• In this paper we provide the formalism to extract, from the correlation of three signals in the Laser Interferometer Space Antenna (LISA), information about the tensor three-point function, which characterizes the non-Gaussian properties of the SGWB.
• This observable can be crucial to discriminate whether a SGWB has a primordial or astrophysical origin.