Gravitational waves generation in turbulent hypermagnetic fields before the electroweak phase transition

TL;DR

This paper investigates how turbulent hypermagnetic fields in the early universe generate relic gravitational waves before the electroweak phase transition, considering turbulence models and particle asymmetries, and discusses their potential observability.

Contribution

It introduces a model for GW production from hypermagnetic turbulence driven by chiral effects before the EWPT, linking early universe physics to GW signals.

Findings

Energy density of GWs evolves from 10 TeV to EWPT

Dependence of GW energy density on hypermagnetic field parameters

Potential detectability of the GW background with current detectors

Abstract

We study the production of relic gravitational waves (GWs) in turbulent hypermagnetic fields (HMFs) in the symmetric phase of the early universe before the electroweak phase transition (EWPT). The noise of HMFs is modeled by the analog of the magnetic hydrodynamics turbulence. The evolution of HMFs is driven by the analogs of the chiral magnetic effect and the Adler anomalies in the presence of the nonzero asymmetries of leptons and Higgs bosons. We track the evolution of the energy density of GWs from 10 TeV down to EWPT and analyze its dependence on the parameters of the system. We also discuss the possibility to observe the predicted GW background by the current GW detectors.