Pion transverse-momentum spectrum, elliptic flow, and Hanbury-Brown-Twiss interferometry in a viscous granular source model
Pion transverse-momentum spectrum, elliptic flow, and Hanbury-Brown-Twiss interferometry in a viscous granular source model
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粘性颗粒源模型中的π介子横向动量谱、椭圆流和 Hanbury-Brown-Twiss 干涉测量
DOI:
10.1088/1674-1137/41/8/084102
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发表时间:
2016-08
影响因子:
3.6
通讯作者:
Yan-Yu Ren
中科院分区:
文献类型:
--
作者:
Jing Yang;Wei-Ning Zhang;Yan-Yu Ren
We examine the evolution of quark-gluon plasma (QGP) droplets with viscous hydrodynamics and analyze the pion transverse-momentum spectrum, elliptic flow, and Hanbury-Brown-Twiss (HBT) interferometry in a granular source model consisting of viscous QGP droplets. The shear viscosity of the QGP droplet speeds up and slows down the droplet evolution in the central and peripheral regions of the droplet, respectively. The effect of the bulk viscosity on the evolution is negligible. Although there are viscous effects on the droplet evolution, the pion momentum spectrum and elliptic flow change little for granular sources with and without viscosity. On the other hand, the influence of viscosity on HBT radius $R_{\rm out}$ is considerable. It makes $R_{\rm out}$ decrease in the granular source model. We determine the model parameters of granular sources using the experimental data of pion transverse-momentum spectrum, elliptic flow, and HBT radii together, and investigate the effects of viscosity on the model parameters. The results indicate that the granular source model may reproduce the experimental data of pion transverse-momentum spectrum, elliptic flow, and HBT radii in heavy-ion collisions of Au-Au at $\sqrt{s_{NN}}=200$ GeV and Pb-Pb at $\sqrt{s_{NN}}=2.76$ TeV in different centrality intervals. The viscosity of the droplet leads to an increase in the initial droplet radius and a decrease of the source shell parameter in the granular source model.
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影响因子:
3.1
作者:
I. Karpenko;P. Huovinen;M. Bleicher;H. Petersen
通讯作者:
I. Karpenko;P. Huovinen;M. Bleicher;H. Petersen
DOI:
10.1016/s0370-1573(99)00032-0
发表时间:
1999-01
期刊:
Physics Reports
影响因子:
--
作者:
U. Wiedemann;U. Heinz
通讯作者:
U. Wiedemann;U. Heinz
DOI:
10.1016/j.nuclphysa.2010.08.002
发表时间:
2010-03
期刊:
Nuclear Physics
影响因子:
--
作者:
A. Monnai;Tetsufumi Hirano
通讯作者:
A. Monnai;Tetsufumi Hirano
影响因子:
1.6
作者:
Y. Hama;Takeshi Kodama;O. Socolowski
通讯作者:
Y. Hama;Takeshi Kodama;O. Socolowski
影响因子:
3.1
作者:
C. Shen;U. Heinz;P. Huovinen;Huichao Song
通讯作者:
C. Shen;U. Heinz;P. Huovinen;Huichao Song