Strong-coupling diffusion in relativistic systems

Pramana

Georg Wolschin1¹ 

[1] Universität Heidelberg, D-69120 Heidelberg, Germany$$

关键词: Relativistic heavy-ion collisions;    fluctuation phenomena;    relativistic diffusion model;    net-proton rapidly distributions;    approach to thermal equilibrium.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Different from the early universe, heavy-ion collisions at very high energies do not reach statistical equilibrium, although thermal models explain many of their features. To account for nonequilibrium strong-coupling effects, a Fokker–Planck equation with time-dependent diffusion coefficient is proposed. A schematic model for rapidity distributions of participant baryons is set up and solved analytically. The evolution from SIS via AGS and SPS to RHIC energies is discussed. Strong-coupling diffusion produces double-peaked spectra in central collisions at the higher SPS momentum of 158 A$cdot$GeV/c and beyond.

【 授权许可】

Unknown