Quark pair creation in color electric fields and effects of magnetic fields

TL;DR

This paper investigates the non-perturbative creation of quark pairs in uniform color electric and magnetic fields, analyzing their dynamics, quantum effects, and impact on system anisotropy and chiral charge.

Contribution

It provides a gauge-invariant characterization of the color electric field and explores the effects of magnetic fields on pair creation and chiral charge induction.

Findings

Momentum distributions exhibit plasma oscillations and quantum interference.

Pair creation reduces pressure anisotropy.

Magnetic fields enhance pair creation and induce chiral charge.

Abstract

The time evolution of a system where a uniform and classical SU(3) color electric field and quantum fields of quarks are dynamically coupled with each other is studied focusing on non-perturbative pair creation and its back reaction. We characterize the color direction of the electric field in a gauge invariant way, and investigate its dependence. Momentum distributions of created quarks show plasma oscillation as well as quantum effects such as the Pauli blocking and interference. Pressure of the system is also calculated, and we show that pair creation moderates degree of anisotropy of pressure. Furthermore, enhancement of pair creation and induction of chiral charge under a color magnetic field which is parallel to the electric field are discussed.