Effect of Longitudinal Fluctuations of $3$D Weizsäcker-Williams Field on Pressure Isotropization of Glasma
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2024
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866911786118152192 |
|---|---|
| author | Matsuda, Hidefumi Huang, Xu-Guang |
| author_facet | Matsuda, Hidefumi Huang, Xu-Guang |
| contents | We investigate the effects of boost invariance breaking on the isotropization of pressure in the glasma, using the $3+1$D glasma simulation. The breaking is attributed to spatial fluctuations of the classical color charge density along the collision axis. We present numerical results for pressure and energy density at mid-rapidity and across a wider rapidity region. It is found that, despite varying longitudinal correlation lengths, the behaviors of the pressure isotropizations are qualitatively similar. The numerical results suggest that, in the initial stage, longitudinal color electromagnetic fields develop, similar to those in the boost invariant glasma. Subsequently, these fields evolve into a dilute glasma, expanding longitudinally in a manner akin to a dilute gas. We also show that the energy density at mid-rapidity exhibits a $1/τ$ decay in the dilute glasma stage. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_04296 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Effect of Longitudinal Fluctuations of $3$D Weizsäcker-Williams Field on Pressure Isotropization of Glasma Matsuda, Hidefumi Huang, Xu-Guang Plasma Physics High Energy Physics - Phenomenology Nuclear Theory We investigate the effects of boost invariance breaking on the isotropization of pressure in the glasma, using the $3+1$D glasma simulation. The breaking is attributed to spatial fluctuations of the classical color charge density along the collision axis. We present numerical results for pressure and energy density at mid-rapidity and across a wider rapidity region. It is found that, despite varying longitudinal correlation lengths, the behaviors of the pressure isotropizations are qualitatively similar. The numerical results suggest that, in the initial stage, longitudinal color electromagnetic fields develop, similar to those in the boost invariant glasma. Subsequently, these fields evolve into a dilute glasma, expanding longitudinally in a manner akin to a dilute gas. We also show that the energy density at mid-rapidity exhibits a $1/τ$ decay in the dilute glasma stage. |
| title | Effect of Longitudinal Fluctuations of $3$D Weizsäcker-Williams Field on Pressure Isotropization of Glasma |
| topic | Plasma Physics High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2401.04296 |