Analysis of Multi-Particle Production at RHIC by Two-Source Statistical Model

LU Zhong-Dao; SA Ben-Hao; Amand Faessler

Chinese Physics C> 2002, Vol. 26> Issue(11) : 1166-1171

Analysis of Multi-Particle Production at RHIC by Two-Source Statistical Model

China Institute of Atomic Energy, Beijing 102413, China2 The China Center of Advance Science and Technology CCAST, Beijing 100080, China3 Institute for Theoretical Physics, University of Tuebingen, D 72076 Tubingen, Germany4 Institute for Nuclear Physics, Moscow State University, 119899 Moscow, Russia

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Abstract：
The data of multi particle production in SNN=130 GeV Au+Au collisions are analyzed by two source statistical model. It is found that in this reaction the two sources (inner source and outer source) are identical. They have the same temperature, volume, particle density and other thermodynamic quantities. Besides, the results of two source model are identical with that of single source model (the total volume of the two sources equals the volume of single source). The identities between two sources and between two models are due to the particles being measured in a limited central rapidity region. The SNN=130 GeV Au+Au collision has large rapidity region, while data are taken from a small pseudo-rapidity region, η<0.5. In the region, the particles are uniformly distributed as a single source. Comparing to the inner source in 158 A GeV/c Pb+Pb collision, which has a small and hot inner source surrounded by a larger and cooler outer source, the temperature is at least 15MeV higher and the volume is at least two times larger. The RHIC can provide a hot and large inner source that may be formed in the early stage of hadronization from QGP and may have important physical content behind. We suggest to make synchronous measurement in the outer region, e.g. 3<y<4, so as to make comparison.

References

[1]

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LU Zhong-Dao, SA Ben-Hao and Amand Faessler. Analysis of Multi-Particle Production at RHIC by Two-Source Statistical Model[J]. Chinese Physics C, 2002, 26(11): 1166-1171.

LU Zhong-Dao, SA Ben-Hao and Amand Faessler. Analysis of Multi-Particle Production at RHIC by Two-Source Statistical Model[J]. Chinese Physics C, 2002, 26(11): 1166-1171. shu

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Received: 2001-12-26
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Analysis of Multi-Particle Production at RHIC by Two-Source Statistical Model

Corresponding author: LU Zhong-Dao,

China Institute of Atomic Energy, Beijing 102413, China2 The China Center of Advance Science and Technology CCAST, Beijing 100080, China3 Institute for Theoretical Physics, University of Tuebingen, D 72076 Tubingen, Germany4 Institute for Nuclear Physics, Moscow State University, 119899 Moscow, Russia

Received Date: 2001-12-26

Accepted Date: 1900-01-01

Available Online: 2002-11-05

Abstract: The data of multi particle production in SNN=130 GeV Au+Au collisions are analyzed by two source statistical model. It is found that in this reaction the two sources (inner source and outer source) are identical. They have the same temperature, volume, particle density and other thermodynamic quantities. Besides, the results of two source model are identical with that of single source model (the total volume of the two sources equals the volume of single source). The identities between two sources and between two models are due to the particles being measured in a limited central rapidity region. The SNN=130 GeV Au+Au collision has large rapidity region, while data are taken from a small pseudo-rapidity region, η<0.5. In the region, the particles are uniformly distributed as a single source. Comparing to the inner source in 158 A GeV/c Pb+Pb collision, which has a small and hot inner source surrounded by a larger and cooler outer source, the temperature is at least 15MeV higher and the volume is at least two times larger. The RHIC can provide a hot and large inner source that may be formed in the early stage of hadronization from QGP and may have important physical content behind. We suggest to make synchronous measurement in the outer region, e.g. 3<y<4, so as to make comparison.

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