The VII-th International Conference on the Initial Stages of High-Energy Nuclear Collisions : Initial Stages 2023

Instabilities at the earliest phase of heavy-ion collisions

Not scheduled

20m

Copenhagen

Poster

Speaker

Sylwia Bazak (Jan Kochanowski University)

Description

At the earliest phase of relativistic heavy-ion collisions there is generated a system of gluon fields which can be treated as classical. Numerical simulations show that the system is unstable but a character of the instability is not well understood. We perform a stability analysis of the initial chromoelectric and chromomagnetic which are parallel the beam direction. While a configuration of the chromoelectric field is essentially Abelian with the single-color potential linearly depending on coordinates, the chromomagnetic is genuinely nonAbelian generated by the multicolor noncommuting potential components. We derive a spectrum of small fluctuations around the background fields which obey the linearized Yang-Mills equations and we argue that the nonAbelian chromomagnetic field is mostly responsible for the system’s instability.
The study is a continuation of our two recent works:
1) S. Bazak and St. Mrówczyński, Stability of classical chromodynamic fields,
Physical Review D 105, 034023 (2022)
2) S. Bazak and St. Mrówczyński, Addendum to “Stability of classical chromodynamic fields”,
Physical Review D 106, 034031 (2022)