literature

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

Collaboration
Apr, 2010
5 pages
Published in:
  • Phys.Rev.C 82 (2010) 021901
e-Print:

Citations per year

2010201320162019202101234
Abstract: (arXiv)
Results on Λ\Lambdap 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 Λ\Lambda sample was collected, allowing for the investigation of Λ\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 Λ\Lambdap emission source. The Λ\Lambdap source radius is found slightly smaller than the pp correlation radius for a similar collis ion system. The present Λ\Lambdap 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 Λ\Lambdap 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