On magnetization of quark-gluon plasma at the LHC experiment energies

TL;DR

This paper investigates the generation of large-scale magnetic and chromomagnetic fields in quark-gluon plasma after the deconfinement transition, proposing their potential as signals in LHC heavy ion collision experiments.

Contribution

It introduces a mechanism for the spontaneous creation of magnetic and chromomagnetic fields in QCD at high temperatures, relevant for LHC experiments.

Findings

Fields are generated due to vacuum polarization and gluon interactions.

Created fields are temperature-dependent and occupy macroscopic volumes.

Magnetization may serve as a signal for the deconfinement phase transition.

Abstract

Large scale chromomagnetic, B_3, B_8, and usual magnetic,H, fields have to be generated in QCD after the deconfinement phase transition (DPT) at temperatures T larger than deconfinement temperature T_d. The two former fields are created spontaneously due to asymptotic freedom of gluon intaractions. Whereas H is produced due to either the feature of quarks to possess both electric and color charges or a vacuum polarization in this case. At the polarization, the vacuum quark loops mix the external fields. As a result, B_3, B_8 become the sources generating H. The latter field appears at $T$ much lower than the electroweak phase transition temperature T_ew. This mechanism should exhibit itself at the LHC experiments on heavy ion collisions. It operates at the one-loop diagram level for an effective potential. The created fields are temperature dependent and occupying the macroscopic volume of quark-gluon plasma. The magnetization influences different processes and may serve as a signal for the DPT.