在RHIC的极限碎裂和Ф介子产生(英文)  

Limiting Fragmentation and Ф Meson Production at RHIC

作　　者：萨本豪[1] 苏宗涤[2] 台安 周代梅[4] 

机构地区：[1]中国原子能科学研究院 [2]中国高等科学技术中心(世界实验室),北京1000801 [3]Department of Physics and Astronomy [4]华中师范大学粒子物理研究所,湖北武汉430079

出　　处：《原子核物理评论》2004年第2期142-147,共6页Nuclear Physics Review

基　　金：国家自然科学基金资助项目 ( 10 13 5 0 3 0 ,10 0 75 0 3 5 );美国能源部基金资助项目~~

摘　　要：利用强子和串级联模型LUCIAE研究了PHOBOS的极限碎裂等以及在PHIC进行的Au +Au碰撞中带电粒子多重性的经验标度规律 .对介子的产生机制也通过与带电粒子多重性的比较进行类似的研究 .结果似乎表明在串级碎裂模型中带电粒子和介子有共同的产生机制 .还讨论了PHOBOS经验标度规律的模型依赖性 .The PHOBOS's limiting fragmentation etc. three empirical scaling rules for charged multiplicity in Au+Au collisions at RHIC are investigated by a hadron and string cascade model (LUCIAE). Similar studies are performed for the  meson exploring its production mechanism via comparing with the charged multiplicity. The LUCIAE results for charged multiplicity are compatible with PHOBOS observations. However, for the  meson the three empirical scaling rules are either kept only or kept better in the LUCIAE calculations without reduction mechanism of the s quark suppression extra introduced for the strangeness in LUCIAE model. These results seem indicating a universal production mechanism for charged particle and  meson in string fragmentation regime. It is discussed that the PHOBOS's empirical scaling rules are model dependent indeed.

关 键 词：极限碎裂 带电粒子 能量依赖 参加对标度 Φ介子 串级联模型 

分 类 号：O572.33[理学—粒子物理与原子核物理]