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

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 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.

Authors:
; ; ; ; ; ; ; ; ; ;  [1]; ; ; ; ; ; ; ; ;  [2]
  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)
Publication Date:
OSTI Identifier:
21420878
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 82; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.82.021901; (c) 2010 The American Physical Society; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ARGON; ATOM-MOLECULE COLLISIONS; BEAMS; BROOKHAVEN AGS; BROOKHAVEN RHIC; CERN SPS SYNCHROTRON; COLLISIONS; CORRELATION FUNCTIONS; ELECTRON SPECTROMETERS; ELECTROPRODUCTION; EMISSION; GEV RANGE 01-10; POTASSIUM CHLORIDES; STATISTICS; ACCELERATORS; ALKALI METAL COMPOUNDS; ATOM COLLISIONS; BASIC INTERACTIONS; CHLORIDES; CHLORINE COMPOUNDS; CYCLIC ACCELERATORS; ELECTROMAGNETIC INTERACTIONS; ELEMENTS; ENERGY RANGE; FLUIDS; FUNCTIONS; GASES; GEV RANGE; HALIDES; HALOGEN COMPOUNDS; HEAVY ION ACCELERATORS; INTERACTIONS; MATHEMATICS; MEASURING INSTRUMENTS; MOLECULE COLLISIONS; NONMETALS; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; POTASSIUM COMPOUNDS; RARE GASES; SPECTROMETERS; STORAGE RINGS; SYNCHROTRONS

Citation Formats

Agakishiev, G, Destefanis, M, Gilardi, C, Kirschner, D, Kuehn, W, Lange, J S, Metag, V, Mishra, D, Pechenova, O, Spataro, S, Spruck, B, Balanda, A, Dybczak, A, Michalska, B, Otwinowski, J, Przygoda, W, Salabura, P, Trebacz, R, Wisniowski, M, and Wojcik, T. {Lambda}-p femtoscopy in collisions of Ar+KCl at 1.76A GeV. United States: N. p., 2010. Web. doi:10.1103/PHYSREVC.82.021901.
Agakishiev, G, Destefanis, M, Gilardi, C, Kirschner, D, Kuehn, W, Lange, J S, Metag, V, Mishra, D, Pechenova, O, Spataro, S, Spruck, B, Balanda, A, Dybczak, A, Michalska, B, Otwinowski, J, Przygoda, W, Salabura, P, Trebacz, R, Wisniowski, M, & Wojcik, T. {Lambda}-p femtoscopy in collisions of Ar+KCl at 1.76A GeV. United States. https://doi.org/10.1103/PHYSREVC.82.021901
Agakishiev, G, Destefanis, M, Gilardi, C, Kirschner, D, Kuehn, W, Lange, J S, Metag, V, Mishra, D, Pechenova, O, Spataro, S, Spruck, B, Balanda, A, Dybczak, A, Michalska, B, Otwinowski, J, Przygoda, W, Salabura, P, Trebacz, R, Wisniowski, M, and Wojcik, T. 2010. "{Lambda}-p femtoscopy in collisions of Ar+KCl at 1.76A GeV". United States. https://doi.org/10.1103/PHYSREVC.82.021901.
@article{osti_21420878,
title = {{Lambda}-p femtoscopy in collisions of Ar+KCl at 1.76A GeV},
author = {Agakishiev, G and Destefanis, M and Gilardi, C and Kirschner, D and Kuehn, W and Lange, J S and Metag, V and Mishra, D and Pechenova, O and Spataro, S and Spruck, B and Balanda, A and Dybczak, A and Michalska, B and Otwinowski, J and Przygoda, W and Salabura, P and Trebacz, R and Wisniowski, M and Wojcik, T},
abstractNote = {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.},
doi = {10.1103/PHYSREVC.82.021901},
url = {https://www.osti.gov/biblio/21420878}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 2,
volume = 82,
place = {United States},
year = {Sun Aug 15 00:00:00 EDT 2010},
month = {Sun Aug 15 00:00:00 EDT 2010}
}