中国物理B ›› 2008, Vol. 17 ›› Issue (7): 2458-2465.doi: 10.1088/1674-1056/17/7/020

• NUCLEAR PHYSICS • 上一篇    下一篇

Transverse momentum and transverse mass distributions of charged hadrons produced in Au--Au collisions at high energies

刘福虎   

  1. Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China
  • 收稿日期:2007-10-14 修回日期:2007-11-07 出版日期:2008-07-09 发布日期:2008-07-09
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10675077 and 10275042), the Shanxi Provincial Natural Science Foundation of China (Grant No 2007011005), and the Shanxi Provincial Foundation of China for Returned Overseas Scholars.

Transverse momentum and transverse mass distributions of charged hadrons produced in Au--Au collisions at high energies

Liu Fu-Hu(刘福虎)†   

  1. Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China
  • Received:2007-10-14 Revised:2007-11-07 Online:2008-07-09 Published:2008-07-09
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10675077 and 10275042), the Shanxi Provincial Natural Science Foundation of China (Grant No 2007011005), and the Shanxi Provincial Foundation of China for Returned Overseas Scholars.

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摘要： The transverse momentum distribution and the transverse mass distribution of charged hadrons produced in nucleus--nucleus collisions at high energies are described by using a two-cylinder model. The results calculated by the model are compared and found to be in agreement with the experimental data of the STAR and E895 Collaborations, measured in Au--Au collisions at the relativistic heavy ion collider (RHIC) and alternating-gradient synchrotron (AGS) energies, respectively. In the energy range concerned, the excitation degree of emission source close to the central axis of cylinders increases obviously with the collision centrality and incident energy increasing, but it does not show any obvious change with the increase of the (pseudo)rapidity in central collisions. The excitation degree of emission source close to the side-surface of cylinders does not show any obvious change with the collision centrality, the (pseudo)rapidity, and the incident energy increasing.

Abstract: The transverse momentum distribution and the transverse mass distribution of charged hadrons produced in nucleus--nucleus collisions at high energies are described by using a two-cylinder model. The results calculated by the model are compared and found to be in agreement with the experimental data of the STAR and E895 Collaborations, measured in Au--Au collisions at the relativistic heavy ion collider (RHIC) and alternating-gradient synchrotron (AGS) energies, respectively. In the energy range concerned, the excitation degree of emission source close to the central axis of cylinders increases obviously with the collision centrality and incident energy increasing, but it does not show any obvious change with the increase of the (pseudo)rapidity in central collisions. The excitation degree of emission source close to the side-surface of cylinders does not show any obvious change with the collision centrality, the (pseudo)rapidity, and the incident energy increasing.

Key words: transverse momentum, two-cylinder model, nucleus--nucleus collisions

中图分类号:  (Particle and resonance production)

  • 25.75.Dw
27.80.+w (190 ≤ A ≤ 219)