@article{28fca0f1412340f8a208fb7c1175bbf7,
title = "Estimation of hydrodynamical model parameters from the invariant spectrum and the Bose-Einstein correlations of π- mesons produced in (π+/Κ+) p interactions at 250 GeV/c",
abstract = "The invariant spectra of π- mesons produced in (π+/Κ+)p interactions at 250 GeV / c are analysed in the framework of the hydrodynamical model of three-dimensionally expanding cylindrically symmetric finite systems. A satisfactory description of experimental data is achieved. The data favour the pattern according to which the hadron matter undergoes predominantly longitudinal expansion and non-relativistic transverse expansion with mean transverse velocity 〈ut〉 = 0.20 ± 0.07, and is characterized by a large temperature inhomogeneity in the transverse direction: the extracted freeze-out temperature at the center of the tube and at the transverse rms radius are 140 ± 3 MeV and 82 ± 7 MeV, respectively. The width of the (longitudinal) space-time rapidity distribution of the pion source is found to be Δn = 1.36 ± 0.02. Combining this estimate with results of the Bose-Einstein correlation analysis in the same experiment, one extracts a mean freeze-out time of the source of (τf) = 1.4 ± 0.1 fm/c and its transverse geometrical rms radius, RG(rms) = 1.2 ± 0.2 fm.",
author = "Agababyan, {N. M.} and Atayan, {M. R.} and T. Cs{\"o}rgo and {De Wolf}, {E. A.} and K. Dziunikowska and Endler, {A. M F} and Garutchava, {Z. Sh} and Gulkanyan, {H. R.} and Hakobyan, {R. Sh} and Karamyan, {J. K.} and D. Kisielewska and W. Kittel and Mehrabyan, {S. S.} and Metreveli, {Z. V.} and K. Olkiewicz and Rizatdinova, {F. K.} and Shabalina, {E. K.} and Smirnova, {L. N.} and Tabidze, {M. D.} and Tikhonova, {L. A.} and Tkabladze, {A. V.} and Tomaradze, {A. G.} and F. Verbeure and Zotkin, {S. A.}",
note = "Funding Information: We are grateful to J.D. Bjorken for encouragement on this topic and to B. L{\"o}rstad for suggestions. We are grateful to the III. Physikalisches Institut B, RWTH Aachen, Germany, the DESY-Institut f{\"u}r Hochenergiephysik, Berlin-Zeuthen, Germany, the Institute for High Energy Physics, Protvino, Russia, the Department of High Energy Physics, Helsinki University, Finland, and the University of Warsaw and Institute of Nuclear Problems, Poland for early contributions to this experiment. This work is part of the research program of the “Stichting voor Fundamenteel Onderzoek der Materie (FOM){"}, which is financially supported by the “Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO){"}. We further thank NWO for support of this project within the program for subsistence to the former Soviet Union (07-13-038). The activity of the Yerphi group is partially supported by the Government of Republic of Armenia, in the framework of the theme no.94-496. Funding Information: This work was partially supported by the Hungarian NSF grants OTKA - T016206, T024094 and T026435. ",
year = "1998",
month = mar,
day = "12",
doi = "10.1016/S0370-2693(98)00072-0",
language = "English (US)",
volume = "422",
pages = "359--368",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",
number = "1-4",
}