Two-Pion Interferometry for the Granular Sources in Ultrarelativistic Heavy Ion Collisions at the RHIC and the LHC
Two-Pion Interferometry for the Granular Sources in Ultrarelativistic Heavy Ion Collisions at the RHIC and the LHC
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DOI：
10.1088/0256-307x/28/12/122501
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发表时间：
2011-07
影响因子：
3.5
通讯作者：
Wei-Ning Zhang;Hongjie Yin;Yan-Yu Ren
中科院分区：
文献类型：
--
作者：
Wei-Ning Zhang;Hongjie Yin;Yan-Yu Ren
研究了夸克-胶子等离子体液滴颗粒源模型中超相对论性重离子碰撞中的双介子干涉测量。粒子源的介子横向动量谱和HBT半径与RHIC中最中心的200 GeV Au-Au碰撞和LHC中= 2.76 TeV Pb-Pb碰撞的实验数据吻合较好。在颗粒源模型中，与RHIC碰撞相比，LHC碰撞的初始系统破裂时间更大，可能导致更大的HBT半径Rout， Rside和Rlong。然而，颗粒源中较大的液滴横向膨胀和有限的平均相对发射时间导致横向Hanbury-Brown-Twiss半径Rout/Rside比略小。
We investigate the two-pion interferometry in ultrarelativistic heavy ion collisions in the granular source model of quark-gluon plasma droplets. The pion transverse momentum spectra and HBT radii of the granular sources agree well with the experimental data of the most central Au-Au collisions at = 200 GeV at the RHIC and Pb-Pb collisions at = 2.76 TeV at the LHC. In the granular source model the larger initial system breakup time for the LHC collisions as compared to the RHIC collisions may lead to the larger HBT radii Rout, Rside and Rlong. However, the large droplet transverse expansion and limited average relative emitting time of particles in the granular source lead to slightly smaller ratios of the transverse Hanbury-Brown-Twiss radii Rout/Rside.