Analysis Method of High-Order Collective-Flow Correlations Based on the Concept of Correlative Degree

ZHANG WeiGang

Chinese Physics C> 2000, Vol. 24> Issue(10) : 962-968

Analysis Method of High-Order Collective-Flow Correlations Based on the Concept of Correlative Degree

ZHANG WeiGang ^,

Dean's Office of Guangxi Institute of Technology, Liuzhou 545005, China

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Abstract：
Based on the concept of correlative degree, a new method of high-order collective-flow measurement is constructed in this paper, with which azimuthal correlations, correlations of final state transverse momentum magnitude and transverse correlations can be inspected respectively. Using the new method the contributions of the azimuthal correlations of particles distribution and the correlations of transverse momentum magnitude of final state particles to high-order collective-flow correlations are analyzed respectively with 4π experimental events for 1.2A GeV Ar+BaI₂ collisions at the Bevalac stream chamber. Comparing with the correlations of transverse momentum magnitude, the azimuthal correlations of final state particles distribution dominate high-order collective-flow correlations in this experimental samples. The contributions of correlations of transverse momentum magnitude of final state particles not only enhance the strength of the high-order correlations of particle group, but also provide important information for the measurement of the collectivity of collective flow within the more constraint district.

References

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ZHANG WeiGang. Analysis Method of High-Order Collective-Flow Correlations Based on the Concept of Correlative Degree[J]. Chinese Physics C, 2000, 24(10): 962-968.

ZHANG WeiGang. Analysis Method of High-Order Collective-Flow Correlations Based on the Concept of Correlative Degree[J]. Chinese Physics C, 2000, 24(10): 962-968. shu

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Received: 1999-08-02
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Analysis Method of High-Order Collective-Flow Correlations Based on the Concept of Correlative Degree

Corresponding author: ZHANG WeiGang,

Dean's Office of Guangxi Institute of Technology, Liuzhou 545005, China

Received Date: 1999-08-02

Accepted Date: 1900-01-01

Available Online: 2000-10-05

Abstract: Based on the concept of correlative degree, a new method of high-order collective-flow measurement is constructed in this paper, with which azimuthal correlations, correlations of final state transverse momentum magnitude and transverse correlations can be inspected respectively. Using the new method the contributions of the azimuthal correlations of particles distribution and the correlations of transverse momentum magnitude of final state particles to high-order collective-flow correlations are analyzed respectively with 4π experimental events for 1.2A GeV Ar+BaI₂ collisions at the Bevalac stream chamber. Comparing with the correlations of transverse momentum magnitude, the azimuthal correlations of final state particles distribution dominate high-order collective-flow correlations in this experimental samples. The contributions of correlations of transverse momentum magnitude of final state particles not only enhance the strength of the high-order correlations of particle group, but also provide important information for the measurement of the collectivity of collective flow within the more constraint district.

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Analysis Method of High-Order Collective-Flow Correlations Based on the Concept of Correlative Degree

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