Lambda-p femtoscopy in collisions of Ar+KCl at 1.76 AGeV
Apr, 2010Citations per year
Abstract: (arXiv)
Results on 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 sample was collected, allowing for the investigation of 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 p emission source. The p source radius is found slightly smaller than the pp correlation radius for a similar collis ion system. The present 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 p source radius to increase almost linearly with the number of participants to the power of one-third.Note:
- 5 pages, 3 figures, submitted to Phys. Rev. C
- 25.75.Gz
- 25.75.Dw
- 25.75.-q
- p: emission
- nucleus nucleus: nuclear reaction
- argon
- potassium: chlorine
- Lambda: hadroproduction
- Lambda: hadronic decay
- nuclear reaction: space-time
References(23)
Figures(4)