Theoretical analysis for the apparent discrepancy between pbarp and pp data in charged particle forward-backward multiplicity correlations

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dc.creatorYan, Yu-Liang
dc.creatorDong, Bao-Guo
dc.creatorZhou, Dai-Mei
dc.creatorLi, Xiao-Mei
dc.creatorSa, Ben-Hao
dc.date2007-10-11
dc.date2008-02-20
dc.date.accessioned2026-07-07T11:12:08Z
dc.date.available2026-07-07T11:12:08Z
dc.descriptionThe strength of charged particle forward-backward multiplicity correlation in pbar+p and p+p collisions at s^1/2 = 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.
dc.description5 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0710.2187
dc.identifierhttp://arxiv.org/abs/0710.2187
dc.identifierPhys.Lett.B660:478-482,2008
dc.identifierdoi:10.1016/j.physletb.2008.01.048
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/191280
dc.subjectNuclear Theory
dc.titleTheoretical analysis for the apparent discrepancy between pbarp and pp data in charged particle forward-backward multiplicity correlations
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