arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0812.4125nucl-th
收藏

具有高斯初始条件的RHIC HBT难题的解

Solution of the RHIC HBT puzzle with Gaussian initial conditions

W. Florkowski, W. Broniowski, M. Chojnacki, A. Kisiel

摘要:

有人认为,在RHIC研究的相对论性重离子碰撞的横向动量谱,椭圆流,和HBT半径的一致的描述可以得到内的流体动力学模型,如果使用高斯分布的初始能量密度在横向平面。此外,委员会认为,我们表明,在该方案中获得的结果与早期开始的流体动力学(在适当的时间τ 0 = 0.25 fm)实际上等同于在流体力学之前有部分子自由流动阶段的模型中获得的结果(在适当的时间间隔0.25 fm < tau < 1 fm)突然平衡,并在朗道匹配条件的帮助下转换到流体动力学状态(在适当的时间τ 0 = 1fm)。

英文摘要:

It is argued that the consistent description of the transverse-momentum spectra, elliptic flow, and the HBT radii in the relativistic heavy-ion collisions studied at RHIC may be obtained within the hydrodynamic model if one uses the Gaussian profile for the initial energy density in the transverse plane. Moreover, we show that the results obtained in the scenario with an early start of hydrodynamics (at the proper time tau0 = 0.25 fm) are practically equivalent to the results obtained in the model where the hydrodynamics is preceded by the free-streaming stage of partons (in the proper time interval 0.25 fm < tau < 1 fm) which suddenly equilibrate and with the help of the Landau matching conditions are transformed into the hydrodynamic regime (at the proper time tau0 = 1 fm).

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。

↑