Gravitationally induced particle production and its impact on structure formation

TL;DR

This paper explores how continuous particle creation influences cosmic structure formation, affecting matter clustering and weak lensing signals, with a focus on the nonlinear growth scale depending on the creation rate.

Contribution

It introduces a model linking particle creation rates to structure formation, analyzing their impact on matter clustering and weak lensing bispectrum signals.

Findings

Nonlinear growth scale varies with particle creation rate.

Particle creation significantly affects weak lensing bispectrum.

Linear and nonlinear clustering behaviors are altered by particle production.

Abstract

In this paper we investigate the influence of a continuous particles creation processes on the linear and nonlinear matter clustering, and its consequences on the weak lensing effect induced by structure formation. We study the line of sight behavior of the contribution to the bispectrum signal at a given angular multipole $l$, showing that the scale where the nonlinear growth overcomes the linear effect depends strongly of particles creation rate.