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arXiv 1202.4852hep-ph
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流体对排斥体积模型中强子谱的影响

The effect of flow on Hadronic Spectra in an Excluded-Volume Model

S. K. Tiwari, P. K. Srivastava, C. P. Singh

摘要:

最近,我们提出了一个物理相容的排除体积模型的HG火球,我们注意到,我们的模型给出了一个合适的描述多粒子生产的各种属性和它们的比例在整个温度和重子密度范围。本文的目的是获得单位快度切片中冻结体积($dV/dy$)以及火球总体积随质心能量$(\sqrt{s_{NN}})$的变化,并将我们的模型计算结果与由Hanbury-Brown-Twiss(HBT)π介子干涉法得到的相应热冻结体积进行比较。我们还测试了我们的模型在提取各种强子的总多重数以及中心快度密度方面的有效性,并将它们与最近的结果进行了比较。我们进一步计算的快速性,以及在不同的重离子对撞机实验中产生的各种粒子的横向动量谱,以检查流的作用,通过匹配我们的预测适当与现有的实验结果。最后,我们扩展了我们的分析生产轻核,超核和他们的反核在一个广泛的能量范围从交替梯度同步加速器(AGS)的大型强子对撞机(LHC)的能量。

英文摘要:

Recently, we proposed a thermodynamically consistent excluded-volume model for the HG fireball and we noticed that our model gives a suitable description for various properties of multiparticle production and their ratios in the entire range of temperatures and baryon densities. The aim in this paper is to obtain the variations of freeze-out volume in a slice of unit rapidity i.e. $dV/dy$ as well as total volume of the fireball with respect to center-of-mass energy $(\sqrt{s_{NN}})$ and confront our model calculations with the corresponding thermal freeze-out volume obtained from the Hanbury-Brown-Twiss (HBT) pion interferometry method. We also test the validity of our model in extracting the total multiplicities as well as the central rapidity densities of various hadrons and comparing them with the recent results. We further calculate the rapidity as well as transverse momentum spectra of various particles produced in different heavy-ion collider experiments in order to examine the role of flow by matching our predictions suitably with the available experimental results. Finally, we extend our analysis for the production of light nuclei, hypernuclei and their antinuclei over a broad energy range from Alternating Gradient Synchrotron (AGS) to Large Hadron Collider (LHC) energies.

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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