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Enhancement of 　Φ meson production in p-p and Pb-Pb collisions at SPS energy

Enhancement of Φ　meson production in p-p and Pb-Pb collisions at SPS energy

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【作者】 王晓荣； 台安； 许怒； 蔡勖； 萨本豪； 周代梅；

【Author】 WANG Xiaorong SA Benhao ZHOU DaimeiTAI An XU Nu & CAI XuInstitute of Particle Physics, Huazhong Normal University, Wuhan 430079, China;China Institute of Atomic Energy, Beijing 102413, China;Department of Physics and Astronomy, University of California, at Los Angeles, CA90095, USA;Lawrence Berkeley National Laboratory, Berkeley, CA94720, USA;Department of Physics and Astronomy, Georgia State University, GA30303, USA

【摘要】 <正> The φ meson yield, rapidity and transverse mass distributions in p-p and Pb-Pb collisions at 158 A GeV were studied by the hadron-string cascade model, LUCIAE. By adjusting the width parameter in qq Gaussian like transverse momentum distribution in string fragmentation to fit the NA49 data ofφ meson transverse mass distribution in p-p collisions, the obtained φ meson rapidity distribution in p-p collisions, the rapidity and transverse mass distributions in Pb-Pb collisions, and the φ meson enhancement factor in Pb-Pb relative to p-p collisions were compatible with corresponding NA49 data, which might be attributed to the collective effect in gluon emission of string and the reduction of strange quark suppression mechanisms involved in the LUCIAE model.

【Abstract】 The φ meson yield, rapidity and transverse mass distributions in p-p and Pb-Pb collisions at 158A GeV were studied by the hadron-string cascade model, LUCIAE. By adjusting the width parameter in qq Gaussian like transverse momentum distribution in string fragmentation to fit the NA49 data of φ meson transverse mass distribution in p-p collisions, the obtained φ meson rapidity distribution in p-p collisions, the rapidity and transverse mass distributions in Pb-Pb collisions, and the φ meson enhancement factor in Pb-Pb relative to p-p collisions were compatible with corresponding NA49 data, which might be attributed to the collective effect in gluon emission of string and the reduction of strange quark suppression mechanisms involved in the LUCIAE model.

【关键词】 p-p and Pb-Pb collisions； transverse-mass distribution； φ meson production； LUCIAE model.；
【Key words】 p-p and Pb-Pb collisions； transverse-mass distribution； φ meson production； LUCIAE model.；
【基金】 This work was supported by the National Natural Science Foundation of China (Grant Nos. 10075035 and 19975075).
  • 【文献出处】 Science in China,Ser.A ,中国科学A辑(英文版) , 编辑部邮箱 ,2002年12期
  • 【分类号】O572.2
  • 【下载频次】12
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