Dissipation, noise and DCC domain formation

TL;DR

This paper studies how friction and noise influence domain formation in disoriented chiral condensates using the linear sigma model, showing that sizable domains can form despite dissipation effects.

Contribution

It demonstrates that domain structures can emerge in the presence of friction and noise within the linear sigma model, extending understanding of chiral condensate dynamics.

Findings

Domains up to 5 fm in size can form after a few fermi of evolution.

Dissipation and noise do not prevent domain formation in the model.

Domain structures are robust under quenched initial conditions.

Abstract

We investigate the effect of friction on domain formation in disoriented chiral condensate. We solve the equation of motion of the linear sigma model, in the Hartree approximation, including a friction and a white noise term. For quenched initial condition, we find that even in presence of noise and dissipation domain like structure emerges after a few fermi of evolution. Domain size as large as 5 fm can be formed.