Theoretical analysis for the apparent discrepancy between (p)over-barp and pp data in charged particle forward-backward multiplicity correlations

CORC > 理论物理研究所 > 中国科学院理论物理研究所 > 理论物理所科研产出 > 理论物理所1978-2010年知识产出

	Theoretical analysis for the apparent discrepancy between (p)over-barp and pp data in charged particle forward-backward multiplicity correlations
	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
	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
内容类型	期刊论文
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.