在RHIC的极限碎裂和φ介子产生

原子核物理评论 , 2004, 21(2): 142-147. doi: 10.3969/j.issn.1007-4627.2004.02.020

在RHIC的极限碎裂和φ介子产生

萨本豪 ^1, , 苏宗涤 ^2, , 台安 ^3, , 周代梅 ^4,

1.中国原子能科学研究院,北京,102413;华中师范大学粒子物理研究所,湖北,武汉,430079;中国高等科学技术中心,世界实验室,北京,100080;中国科学院理论物理研究所,北京,100080

2.中国高等科学技术中心,世界实验室,北京,100080;中国原子能科学研究院,北京,102413

3.Department of Physics and Astronomy,University of California at Los Angeles,Los Angeles,CA 90095,USA

4.华中师范大学粒子物理研究所,湖北,武汉,430079

基金项目: 国家自然科学基金(10135030,10075035) 美国能源部资助项目

关键词：极限碎裂 , 带电粒子的能量依赖 , 参加对标度 , π介子 , LUCIAE模型

Limiting Fragmentation and φ Meson Production at RHIC

Keywords： limiting fragmentation , energy dependence of charged particle , participant pair scaling , π meson , LUCIAE model

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φ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φ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 φ 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 φ 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 φ meson in string fragmentation regime.It is discussed that the PHOBOS's empirical scaling rules are model dependent indeed.

参考文献

[1]	Benecke J,Chou T T,Yang C N,et al.Phys Rev,1969,188:2 159.
[2]	Bearden I G,et al.Phys Lett,2001,B523:227.
[3]	Back B B,et al.Phys Rev Lett,2003,91:052303;nucl-ex/0210015.
[4]	Back B B,et al.Phys Rev Lett,2003,91:052303;nucl-ex/0210015.
[5]	Back B B,et al.nucl-ex/0212009;nucl-ex/0301017.
[6]	Afanasiev S V,Anticic T,Bchler J,et al.Phys Lett,2000,B491:59.
[7]	Xu Nu,Xu Zhangbu.nucl-ex/0211012.
[8]	Müller B,Rafelski J.Phys Rev Lett,1986,81:1066;Koch P,Müller,Rafelski J.Phys Rep,1986,142:167.
[9]	Müller B,Rafelski J.Phys Rev Lett,1986,81:1066;Koch P,Müller,Rafelski J.Phys Rep,1986,142:167.
[10]	Shor A.Phys Rev Lett,1985,54:1 122.
[11]	Ma Jingguo.Nucl-ex/0306013;0306014.
[12]	Sa Benhao,Tai An.Comput Phys Commun,1995,90:121;Tai An,Sa Benhao.Comput Phys Commun,1999,116:353.
[13]	Sa Benhao,Tai An.Comput Phys Commun,1995,90:121;Tai An,Sa Benhao.Comput Phys Commun,1999,116:353.
[14]	Wang X N,Gyulassy M.Phys Rev,1991,D44:3 501.
[15]	Pi Hong.Z Phys,1993,C57:485.
[16]	Sa Benhao,Tai An,Lu Zhongdao.Phys Rev,1995,C52:2 069;Andersson B,Tai An,Sa Benhao.Z Phys,1996,C70:499.
[17]	Sa Benhao,Tai An,Lu Zhongdao.Phys Rev,1995,C52:2 069;Andersson B,Tai An,Sa Benhao.Z Phys,1996,C70:499.
[18]	Andersson B,Tai An.Z Phys,1996,C71:155.
[19]	Tai An,Sa Benhao.Phys Lett,1997,B409:393.
[20]	Li Shiyuan,Wang Xinnian.Phys Lett,2002,B527:85.
[21]	Ko C M,Seibert D.Phys Rev,1994,C49:2 198.
[22]	Smith W,Haglin K L.Phys Rev,1998,C57:1 449.
[23]	Pal S,Ko C M,Lin Ziwei.Nucl Phys,2002,A707:525.
[24]	Bravina L,Csernai L,Faessler A,et al.hep-ph/0208161.
[25]	Sa Benhao,Faessler Amand,Fuchs C,et al.Phys Lett,2001,B507:104.
[26]	Sa Benhao,Tai An.Phys Rev,1997,C55:2 010;Sa Benhao,Wang Xiaorong,Tai An,et al.Phys Rev,1999,C60:047901.
[27]	Sa Benhao,Tai An.Phys Rev,1997,C55:2 010;Sa Benhao,Wang Xiaorong,Tai An,et al.Phys Rev,1999,C60:047901.
[28]	Wang X N.Nucl Phys,2002,A702:238.
[29]	Guo X F,Wang X N.Phys Rev Lett,2000,85:3 591;Nucl Phys,2001,A696:788.
[30]	Guo X F,Wang X N.Phys Rev Lett,2000,85:3 591;Nucl Phys,2001,A696:788.
[31]	Accardi A,Pirner H.nucl-th/0205008.
[32]	Lin Ziwei,Pal S,Ko C M,et al.Phys Rev,2001,C64:011902(R).
[33]	Zhang B,Li B A,Sustich A T,et al.Phys Lett,2002,B546:63.
[34]	Sa Benhao,Cai Xu,Kobdaj Chinorat,et al.Commun Theor Phys,2004,41:291;nucl-th/0205078.
[35]	Sa Benhao,Cai Xu,Kobdaj Chinorat,et al.Commun Theor Phys,2004,41:291;nucl-th/0205078.
[36]	Sjostrand T.Comput Phys Commun,1994,82:74.
[37]	Adler C,Ahammed Z,Allgower C,et al.Phys Rev,2002,C65:041901-1(R).
[38]	Sa Benhao,Bonasera A,Tai An,et al.Phys Lett,2002,B537:268.

上一张下一张

计量

下载量()
访问量()

作者相关

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网