Partonic effects on pion interferometry at the relativistic heavy-ion collider.
Partonic effects on pion interferometry at the relativistic heavy-ion collider.
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DOI：
10.1103/physrevlett.89.152301
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发表时间：
2002-04
影响因子：
8.6
通讯作者：
Zi-Wei Lin;C. Ko;S. Pal
中科院分区：
文献类型：
--
作者：
Zi-Wei Lin;C. Ko;S. Pal
利用包含初始部分子相互作用和末态强子相互作用的多相输运模型，研究了相对论重离子对撞机上的π介子干涉测量。我们发现，两π相关函数是敏感的部分子散射截面的大小，它控制的部分子密度发生从部分子到强子物质的过渡。此外，π介子的发射源是非高斯的，导致源半径可以比从高斯拟合到相关函数中提取的半径参数大两倍以上。
Using a multiphase transport model that includes both initial partonic and final hadronic interactions, we study the pion interferometry at the Relativistic Heavy-Ion Collider. We find that the two-pion correlation function is sensitive to the magnitude of the parton-scattering cross section, which controls the parton density at which the transition from the partonic to hadronic matter occurs. Also, the emission source of pions is non-Gaussian, leading to source radii that can be more than twice larger than the radius parameters extracted from a Gaussian fit to the correlation function.