Angular dependence of factorial moments in π+/K+p interactions at 250 GeV/c

N. M. Agababyan*, I. V. Ajinenko, M. R. Atayan, F. Botterweck, M. Charlet, P. V. Chliapnikov, E. A. De Wolf, K. Dziunikowska, A. M F Endler, Z. Sh Garutchava, G. R. Gulkanyan, R. Sh Hakobyan, D. Kisielewska, W. Kittel, S. S. Mehrabyan, Z. V. Metreveli, E. C. de Oliviera, K. Olkiewicz, F. K. Rizatdinova, E. K. ShabalinaL. N. Smirnova, L. A. Tikhonova, A. V. Tkabladze, A. G. Tomaradze, F. Verbeure, S. A. Zotkin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


A sample of π+p and K+p non-diffractive interactions at √s = 22 GeV is used to investigate factorial multiplicity moments as a function of the CMS opening angle θ between particles. The angular dependence is very different for unlike-charge and like-charge particle combinations. For the latter, factorial moments increase with decreasing opening angle approximately as a power law. The θ dependence is stronger for central production-angle intervals than in the forward and backward regions. The predictions of the standard version of the FRITIOF model deviate strongly from the data, but including Bose-Einstein correlations leads to qualitative agreement.

Original languageEnglish (US)
Pages (from-to)199-206
Number of pages8
JournalPhysics Letters B
Issue number1-2
StatePublished - May 26 1994

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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