{Lambda}-p femtoscopy in collisions of Ar+KCl at 1.76A GeV

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.021901· OSTI ID:21420878

Agakishiev, G; Destefanis, M; Gilardi, C; Kirschner, D; Kuehn, W; Lange, J S; Metag, V; Mishra, D; Pechenova, O; Spataro, S; Spruck, B ^[1]; Balanda, A; Dybczak, A; Michalska, B; Otwinowski, J; Przygoda, W; Salabura, P; Trebacz, R; Wisniowski, M; Wojcik, T ^[2]

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1. II.Physikalisches Institut, Justus Liebig Universitaet Giessen, D-35392 Giessen (Germany)
2. Smoluchowski Institute of Physics, Jagiellonian University of Cracow, PL-30-059 Krakow (Poland)

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 low 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 to be slightly smaller than the pp correlation radius for a similar collision system. The present {Lambda}p radius is significantly smaller than that found for Au+Au/Pb+Pb collisions 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.

• OSTI ID: 21420878
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevC.82.021901; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

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