Robustness of principal component analysis of harmonic flow in heavy ion collisions
Robustness of principal component analysis of harmonic flow in heavy ion collisions
复制标题
重离子碰撞谐波流主成分分析的鲁棒性
DOI:
10.1103/physrevc.102.024911
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发表时间:
2020-02
影响因子:
3.1
通讯作者:
Jia Jiangyong
中科院分区:
文献类型:
--
作者:
Liu Ziming;Behera Arabinda;Song Huichao;Jia Jiangyong
The principal component analysis (PCA), a mathematical tool commonly used in statistics, has recently been employed to interpret the $p_T$-dependent fluctuations of harmonic flow $v_n$ in terms of leading and subleading flow modes in heavy ion collisions. Using simulated data from AMPT and HIJING models, we show that the PCA modes are not fixed, but depend on the choice of the particle weight and the $p_T$ range. Furthermore, the shape of the leading mode is affected by the presence of non-flow correlations, and fake subleading mode may arise from the mixing of non-flow correlations with leading flow mode with a magnitude that could be larger than the genuine subleading flow mode. Therefore, the meaning of PCA modes and their relations to physical leading and subleading flow modes associated initial state eccentricities need to be further clarified/validated in realistic model simulations.
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影响因子:
3.1
作者:
A. Mazeliauskas;D. Teaney
通讯作者:
A. Mazeliauskas;D. Teaney
影响因子:
3.1
作者:
F. Gardim;F. Grassi;M. Luzum;J. Ollitrault
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DOI:
10.1016/j.nuclphysa.2013.01.052
发表时间:
2012-10
期刊:
Nuclear Physics
影响因子:
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作者:
Huichao Song
通讯作者:
Huichao Song
影响因子:
1.6
作者:
Gale, Charles;Jeon, Sangyong;Schenke, Bjoern
通讯作者:
Schenke, Bjoern
DOI:
10.1103/physrevc.92.034911
发表时间:
2015-03
期刊:
--
影响因子:
--
作者:
V. Khachatryan;A. Sirunyan;A. Tumasyan;W. Adam;E. Asilar;T. Bergauer;J. Brandstetter;M. Dragicevic-M.-Dr
通讯作者:
V. Khachatryan;A. Sirunyan;A. Tumasyan;W. Adam;E. Asilar;T. Bergauer;J. Brandstetter;M. Dragicevic-M.-Dr