Imaging of granular sources in high energy heavy ion collisions
Imaging of granular sources in high energy heavy ion collisions
复制标题
高能重离子碰撞中颗粒源的成像
DOI:
10.1088/0954-3899/36/1/015113
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发表时间:
2008-08
期刊:
影响因子:
--
通讯作者:
Zhi-Tao Yang
中科院分区:
文献类型:
--
作者:
Wei-Ning Zhang;Yan-Yu Ren;Zhi-Tao Yang
We investigate the source imaging for a granular pion-emitting source model in high energy heavy ion collisions. The two-pion source functions of the granular sources exhibit a two-tiered structure. Using a parametrized formula of a granular two-pion source function, we examine the two-tiered structure of the source functions for the imaging data of Au+Au collisions at the Alternating Gradient Synchrotron (AGS) and the Relativistic Heavy Ion Collider (RHIC). We find that the imaging technique introduced by Brown and Danielewicz is suitable for probing the granular structure of the sources. Our data-fitting results indicate that there is no visible granularity for the sources at AGS energies. However, the data for the RHIC collisions with the selections of 40 < centrality < 90% and 0.20 < kT < 0.36 GeV/c are better described by the model with granular emission than that of one Gaussian. The model with a granular source has more parameters than the simple Gaussian, hence can describe more complicated shapes.
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DOI:
10.1016/j.nuclphysa.2004.12.050
发表时间:
2005-03
期刊:
Nuclear Physics
影响因子:
--
作者:
P. Chung;A. Taranenko;R. Lacey;W. Holzmann;J. Alexander;M. Issah
通讯作者:
P. Chung;A. Taranenko;R. Lacey;W. Holzmann;J. Alexander;M. Issah
DOI:
10.1556/aph.22.2005.3-4.11
发表时间:
2004-07
期刊:
Acta Physica Hungarica A) Heavy Ion Physics
影响因子:
--
作者:
P. Danielewicz;D. Brown;M. Heffner;S. Pratt;R. Soltz
通讯作者:
P. Danielewicz;D. Brown;M. Heffner;S. Pratt;R. Soltz
影响因子:
8.6
作者:
C. Adler;Z. Ahammed;C. Allgower;J. Amonett;B. Anderson;M. Anderson;G. S. Averichev;J. Balewski
通讯作者:
C. Adler;Z. Ahammed;C. Allgower;J. Amonett;B. Anderson;M. Anderson;G. S. Averichev;J. Balewski
影响因子:
8.6
作者:
Pratt;Siemens;Vischer
通讯作者:
Pratt;Siemens;Vischer
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