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arXiv 0910.3585nucl-thnucl-ex
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Glauber模型中相对论性重离子碰撞的涨落

Fluctuations in relativistic heavy-ion collisions from the Glauber models

Wojciech Broniowski, Maciej Rybczynski, Lukasz Obara, Mikolaj Chojnacki

摘要:

在第一部分的谈话中,我们讨论了两体核子-核子关联对重离子碰撞的签名的作用,这是一个先验预期敏感的这些影响。我们发现,虽然产生的粒子数的波动确实受到影响,其他量(v_2波动,尺寸波动)是不敏感的存在下,在核子分布的NN相关。在第二部分中,我们表明,初始源的横向尺寸的波动的原因,经过适当的流体动力学演化,在强子冻结的横向流速的波动。这反过来又产生了所产生粒子的横向动量p_T的逐事件波动。我们的结果表明,实际上所有观察到的逐事件p_T波动可以用这种方式来解释。

英文摘要:

In the first part of the talk we discuss the role of the two-body nucleon-nucleon correlations on signatures of the heavy-ion collisions which are a priori expected to be sensitive to these effects. We find that while the fluctuations of the number of produced particles are indeed affected, other quantities (v_2 fluctuations, size fluctuations) are insensitive to the presence of the NN correlations in the nucleon distributions. In the second part we show that the fluctuations of the transverse size of the initial source cause, after a suitable hydrodynamic evolution, fluctuations of the transverse flow velocity at hadronic freeze-out. This in turn yields the event-by-event fluctuations of the transverse momentum of the produced particles, p_T. Our results demonstrate that practically all of the observed event-by-event p_T fluctuations may be explained this way.

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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