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arXiv 2108.01607hep-phnucl-th
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胶子的非线性扩散

Nonlinear diffusion of gluons

Georg Wolschin

摘要:

本文提出将相对论性重离子碰撞中胶子的快速热化看作动量空间中的扩散过程。导出了具有常漂移系数和扩散系数v,D以及奇异点边界条件的非线性玻色子扩散方程(NBDE)的解析解。计算了在全动量范围内,欠占和过占系统中重离子碰撞中胶子非弹性散射对T< 600 MeV局域中心温度的时间演化.结果与基于QCD的胶子非弹性碰撞热化的数值计算结果一致。

英文摘要:

It is proposed to consider the fast thermalization of gluons in relativistic heavy-ion collisions as a diffusion process in momentum space. Closed-form analytical solutions of a nonlinear boson diffusion equation (NBDE) with constant drift and diffusion coefficients v, D and boundary conditions at the singularity are derived. The time evolution towards local central temperatures T< 600 MeV through inelastic gluon scatterings in heavy-ion collisions is calculated for under- and overoccupied systems in the full momentum range. The results are consistent with QCD-based numerical calculations for gluon thermalization via inelastic gluon collisions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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