| 引用本文： |
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张伟刚.粒子横向动量模的关联对粒子群关联的贡献[J].广西科学,1998,5(4):264-267,275. [点击复制]
- Zhang Weigang.Contribution of Correlations of Transverse Momentum Magnitude of Particles to Particle-group Correlations[J].Guangxi Sciences,1998,5(4):264-267,275. [点击复制]
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| 摘要: |
| 提出一种新的唯象集合流事件模拟方法,该模拟方法同时考虑了粒子分布的方位角关联和横向动量模关联。采用粒子群关联函数方法分析了2.1AGeVNe+NaF碰撞的Bevalac流光室4π实验数据中粒子横向动量模关联对集合流及高阶集合流关联的贡献。研究表明:少数携带较大横向动量的粒子(或碎片)可以产生集合流效应,但高阶集合流关联确不受其支配,而是多数关联粒子(或碎片)集体贡献的结果。对于这组碰撞实验,粒子分布的方位角关联相对横向动量模关联在粒子群关联中起着主要作用。 |
| 关键词: 集合流 粒子群关联 横向动量模关联 高阶集合流关联 |
| DOI： |
| 投稿时间：1998-03-05修订日期：1998-05-25 |
| 基金项目:广西青年科学基金资助项目(项目编号:桂科青9811016)。 |
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| Contribution of Correlations of Transverse Momentum Magnitude of Particles to Particle-group Correlations |
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Zhang Weigang
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| (Dean's Office, Guangxi Institute of Technology, Donghuanlu, Liuzhou, Guangxi, 545005) |
| Abstract: |
| A new simulative method of phenomenological collective flow events is proposed, which involves both the azimuthal correlations of distribution and the correlations of transverse momentum magnitude of particles. Using the method of particlegroup correlation's function,the contributions of the correlations of transverse momentum magnitude of particles on collective flow and high-order collective-flow correlations are analyzed with 4 π data for 2.1 A GeV Ne+NaF collisions at the Bevalac stream chamber.Our studies indicate that the minority of correlated particles (or fragments) with larger transverse momentum magnitudes can produce the effect arising from the collective flow and the effect arising from high-order collective flow correlations can not be dominated by these minority of particles (or fragments),but by the collective contribution of the majority of correlated particles (or fragments).Comparing with the correlations of transverse momentum magnitude,the azimuthal correlations of particles distribution dominate particle-group correlations in this experimental data samples. |
| Key words: collective flow particle-group correlations correlations of transverse momentum magnitude high-order collective-flow correlations |
