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25 April 2024

» arxiv » 1004.2328

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Lambda-p femtoscopy in collisions of Ar+KCl at 1.76 AGeV
G. Agakishiev ; A. Balanda ; R. Bassini ; D. Belver ; A.V. Belyaev ; A. Blanco ; M. Böhmer ; J.L. Boyard ; P. Braun-Munzinger ; P. Cabanelas ; E. Castro ; S. Chernenko ; T. Christ ; M. Destefanis ; J. Díaz ; F. Dohrmann ; A. Dybczak ; T. Eberl ; L. Fabbietti ; O.V. Fateev ; P. Finocchiaro ; P. Fonte ; J. Friese ; I. Fröhlich ; T. Galatyuk ; J.A. Garzón ; R. Gernhäuser ; A. Gil ; C. Gilardi ; M. Golubeva ; D. González-Díaz ; F. Guber ; T. Hennino ; R. Holzmann ; I. Iori ; A. Ivashkin ; M. Jurkovic ; B. Kämpfer ; K. Kanaki ; T. Karavicheva ; D. Kirschner ; I. Koenig ; W. Koenig ; B.W. Kolb ; R. Kotte ; F. Krizek ; R. Krücken ; W. Kühn ; A. Kugler ; A. Kurepin ; S. Lang ; J.S. Lange ; K. Lapidus ; T. Liu ; L. Lopes ; M. Lorenz ; L. Maier ; A. Mangiarotti ; J. Markert ; V. Metag ; B. Michalska ; J. Michel ; D. Mishra ; E. Morinière ; J. Mousa ; C. Müntz ; L. Naumann ; J. Otwinowski ; Y.C. Pachmayer ; M. Palka ; Y. Parpottas ; V. Pechenov ; O. Pechenova ; J. Pietraszko ; W. Przygoda ; B. Ramstein ; A. Reshetin ; M. Roy-Stephan ; A. Rustamov ; A. Sadovsky ; B. Sailer ; P. Salabura ; A. Schmah ; Yu.G. Sobolev ; S. Spataro ; B. Spruck ; H. Ströbele ; J. Stroth ; C. Sturm ; M. Sudol ; A. Tarantola ; K. Teilab ; P. Tlusty ; M. Traxler ; R. Trebacz ; H. Tsertos ; V. Wagner ; M. Weber ; C. Wendisch ; M. Wisniowski ; T. Wojcik ; J. Wüstenfeld ; S. Yurevich ; Y.V. Zanevsky ; P. Zhou ; P. Zumbruch ;
Date:	14 Apr 2010
Abstract:	Results on $Lambda$p femtoscopy are reported at the lowest energy so far. At a beam energy of 1.76A~GeV, the reaction Ar+KCl was studied with the High Acceptance Di-Electron Spectrometer (HADES) at SIS18/GSI. A high-statistics and high-purity $Lambda$ sample was collected, allowing for the investigation of $Lambda$ p correlations at small relative momenta. The experimental correlation function is compared to corresponding model calculations allowing the determination of the space-time extent of the $Lambda$p emission source. The $Lambda$p source radius is found slightly smaller than the pp correlation radius for a similar collis ion system. The present $Lambda$p radius is significantly smaller than that found for Au+Au/Pb+Pb collisio ns in the AGS, SPS and RHIC energy domains, but larger than that observed for electroproduction from He. Taking into account all available data, we find the $Lambda$p source radius to increase almost linearly with the number of participants to the power of one-third.
Source:	arXiv, 1004.2328
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