Lambda-p femtoscopy in collisions of Ar+KCl at 1.76 AGeV

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.

arXiv comment5 pages, 3 figures, submitted to Phys. Rev. C

References in corpus (20)

• Microscopic Models for Ultrarelativistic Heavy Ion Collisions
• Relativistic Hadron-Hadron Collisions in the Ultra-Relativistic Quantum Molecular Dynamics Model (UrQMD)
• Femtoscopy in Relativistic Heavy Ion Collisions: Two Decades of Progress
• Soft-core hyperon-nucleon potentials
• The High-Acceptance Dielectron Spectrometer HADES
• Hyperon-nucleon interactions - a chiral effective field theory approach
• The Juelich hyperon-nucleon model revisited
• Bose-Einstein Correlations of Charged Pion Pairs in Au+Au Collisions at sqrt(s_NN)=200_ GeV
• Phi decay: a relevant source for K- production at SIS energies?
• Deep sub-threshold ${\Xi }^{-}$ production in Ar+KCl reactions at 1.76A GeV
• Dielectron production in 12C+12C collisions at 2 AGeV with HADES
• Proton-lambda correlations in central Au+Au collisions at sqrt (s_NN)=200 GeV
• The hyperon-nucleon interaction: conventional versus effective field theory approach
• System, centrality, and transverse mass dependence of two-pion correlation radii in heavy ion collisions at 11.6 and 14.6 A-GeV
• Kaon interferometric probes of space-time evolution in Au+Au collisions at sqrt(s_NN) = 200 GeV
• Lambda-proton correlations in relativistic heavy ion collisions
• High resolution study of the Lambda p final state interaction in the reaction p + p -> K+ + (Lambda p)
• Results on correlations and fluctuations from NA49
• Two-proton small-angle correlations in central heavy-ion collisions: a beam-energy and system-size dependent study
• Comparison of Source Images for protons, ${\pi }^{-}$'s and $\Lambda$'s in 6 AGeV Au+Au collisions

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