Theoretical analysis for the apparent discrepancy between (p)over-barp and pp data in charged particle forward-backward multiplicity correlations
文献类型：期刊论文
| 作者 | Yan, Yu-Liang; Dong, Bao-Guo; Zhou, Dai-Mei; Li, Xiao-Mei; Sa, Ben-Hao; Sa, BH , China Inst Atom Energy, POB 275 18, Beijing 102413, Peoples R China,Peoples R China |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2008 |
| 卷号 | 660期号:5页码:478-482 |
| 关键词 | By-event Fluctuations Plus Pb Collisions Transverse-momentum Pbarp-collisions Distributions Energies Nucleon |
| ISSN号 | 0370-2693 |
| 英文摘要 | The strength of charged particle forward-backward multiplicity correlation in (p) over bar + p and p + p collisions at root s = 200 GeV is studied by PYTHIA 6.4 and compared to the UA5 and STAR data correspondingly. It is turned out that a factor of 3-4 apparent discrepancy between UA5 and STAR data can be attributed to the differences in detector acceptances and observing bin interval in both experiments. A mixed event method is introduced and used to calculate the statistical correlation strength and the dynamical correlation strengths stemming from the charge conservation, four-momentum conservation, and decay, respectively. It seems that the statistical correlation is much larger than dynamical one and the charge conservation, four-momentum conservation and decay may account for most part of the dynamical correlation. In addition, we have also calculated the correlation strength by fitting the charged particle multiplicity distribution from PYTHIA to the Negative Binomial Distribution and found that the result agrees well with the correlation strength calculated by mixed events. (c) 2008 Elsevier B.V. All rights reserved. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000254034000007 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5561]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Sa, BH , China Inst Atom Energy, POB 275 18, Beijing 102413, Peoples R China,Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Yu-Liang,Dong, Bao-Guo,Zhou, Dai-Mei,et al. Theoretical analysis for the apparent discrepancy between (p)over-barp and pp data in charged particle forward-backward multiplicity correlations[J]. PHYSICS LETTERS B,2008,660(5):478-482. |
| APA | Yan, Yu-Liang,Dong, Bao-Guo,Zhou, Dai-Mei,Li, Xiao-Mei,Sa, Ben-Hao,&Sa, BH , China Inst Atom Energy, POB 275 18, Beijing 102413, Peoples R China,Peoples R China.(2008).Theoretical analysis for the apparent discrepancy between (p)over-barp and pp data in charged particle forward-backward multiplicity correlations.PHYSICS LETTERS B,660(5),478-482. |
| MLA | Yan, Yu-Liang,et al."Theoretical analysis for the apparent discrepancy between (p)over-barp and pp data in charged particle forward-backward multiplicity correlations".PHYSICS LETTERS B 660.5(2008):478-482. |
入库方式： OAI收割
来源：理论物理研究所
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