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Two- and three-dimensional analysis of bose-einstein correlations inπ +/K+p interactions at 250 GeV/c |
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| Authors: | N. M. Agababyan M. R. Atayan M. Charlet J. Czyżewski E. A. De Wolf K. Dziunikowska A. M. F. Endler Z. Sh. Garutchava H. R. Gulkanyan R. Sh. Hakobyan J. K. Karamyan D. Kisielewska W. Kittel S. S. Mehrabyan Z. V. Metreveli E. C. Oliveira K. Olkiewicz F. K. Rizatdinova E. K. Shabalina L. N. Smirnova M. D. Tabidze L. A. Tikhonova A. V. Tkabladze A. G. Tomaradze F. Verbeure S. A. Zotkin |
| Affiliation: | 1. Institute of Physics, AM-375036, Yerevan, Armenia 2. High Energy Physics Institute (HEFIN), University of Nijmegen/NIKHEF, NL-6525 ED, Nijmegen, The Netherlands 4. Department of Physics, Universitaire Instelling Antwerpen, B-2610, Wilrijk, Belgium 5. Onderzoeksleider NFWO, Belgium 6. Institute of Physics and Nuclear Techniques of Academy of Mining and Metallurgy and Institute of Nuclear Physics, PL-30055, Krakow, Poland 7. Centro Brasileiro de Pesquisas Fisicas, BR-22290, Rio de Janeiro, Brazil 8. Institute for High Energy Physics of Tbilisi State University, GE-380086, Tbilisi, Georgia 9. Nuclear Physics Institute, Moscow State University, RU-119899, Moscow, Russia |
| Abstract: | The NA22 data onπ ? π ? correlations are analyzed in terms of a number of two- and three-dimensional parametrizations (Gaussian space-time, Goldhaber, Bowler string-like, Bertsch hydrodynamical, Kopylov-Podgoretskii, etc.). Contrary to the results obtained for e+e? andµp collisions, the Goldhaber parametrization, as well as string-like models, fail in describing the hadron-hadron data. Better fits are obtained in the framework of surface-emitting fireball-like models, both when including and excluding hydrodynamical expansion of nuclear matter. Our results indicate that pion radiation occurs at earlier stages of matter evolution than in nuclear collisions. |
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