Polar Distribution of Final State Particles in High-Energy Heavy Ion Collisions

Huo Lei; Liu Yiming; Zhang Weining; Jiang Yuzhen; D. Keane; S. Y. Fung

Chinese Physics C> 1996, Vol. 20> Issue(S2) : 141-147

Polar Distribution of Final State Particles in High-Energy Heavy Ion Collisions

1 Department of Physics, Harbin Institute of Technology, Harbin, Heilongjiang, China;
2 Department of Physics, Kent State University, Kent, Ohio, U. S. A.;
3 Department of Physics, University of California, Riverside, California, U. S. A.

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The anisotropy of azimuthal distributions for final state particles in center-of-mass systems where the z axis is rotated to various polar angle in the reaction plane is studied, and a method to determine the flow angle is proposed. Studying the polar angle distributions for collisions of 1.2AGeV Ar+KCl,1.2AGeV Ne+NaF,and 2.1AGeV Ne+NaF at the Bevalac streamer chamber in the coordinate systems with the z axis rotated to the flow angle, we can estimate the fraction of the anisotropic emission particles to all the final state particles and the degree of concentration around the flow direction quantitatively.
- collective sideward flow ,
- reaction plane ,
- flow angle

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Huo Lei, Liu Yiming, Zhang Weining, Jiang Yuzhen, D. Keane and S. Y. Fung. Polar Distribution of Final State Particles in High-Energy Heavy Ion Collisions[J]. Chinese Physics C, 1996, 20(S2): 141-147.

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Received: 1995-05-30

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Supported by the National Natural Science Foundation of China, the US Department of Energy, and the US National Science Foundation.

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沈阳化工大学材料科学与工程学院沈阳 110142

Polar Distribution of Final State Particles in High-Energy Heavy Ion Collisions

1 Department of Physics, Harbin Institute of Technology, Harbin, Heilongjiang, China;

2 Department of Physics, Kent State University, Kent, Ohio, U. S. A.;

3 Department of Physics, University of California, Riverside, California, U. S. A.

Received Date: 1995-05-30

Fund Project: Supported by the National Natural Science Foundation of China, the US Department of Energy, and the US National Science Foundation.

Abstract: The anisotropy of azimuthal distributions for final state particles in center-of-mass systems where the z axis is rotated to various polar angle in the reaction plane is studied, and a method to determine the flow angle is proposed. Studying the polar angle distributions for collisions of 1.2AGeV Ar+KCl,1.2AGeV Ne+NaF,and 2.1AGeV Ne+NaF at the Bevalac streamer chamber in the coordinate systems with the z axis rotated to the flow angle, we can estimate the fraction of the anisotropic emission particles to all the final state particles and the degree of concentration around the flow direction quantitatively.

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