Published May 2011 | Version v1
Journal article

pp and ππ intensity interferometry in collisions of Ar+KCl at 1.76A GeV

Creators

  • 1. Justus Liebig Universitaet Giessen, II.Physikalisches Institut, Giessen (Germany)
  • 2. Jagiellonian University of Cracow, Smoluchowski Institute of Physics, Krakow (Poland)
  • 3. Helmholtz-Zentrum Dresden-Rossendorf, Institut fuer Strahlenphysik, Dresden (Germany)
  • 4. Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Milano (Italy)
  • 5. Universidad de Santiago de Compostela, Departamento de Fisica de Particulas, Santiago de Compostela (Spain)
  • 6. Joint Institute of Nuclear Research, Dubna (Russian Federation)
  • 7. LIP-Laboratorio de Instrumentacao e Fisica Experimental de Particulas, Coimbra (Portugal)
  • 8. Technische Universitaet Muenchen, Physik Department E12, Muenchen (Germany)
  • 9. CNRS/IN2P3 - Universite Paris Sud, Institut de Physique Nucleaire (UMR 8608), Orsay Cedex (France)
  • 10. Universidad de Valencia-CSIC, Instituto de Fisica Corpuscular, Valencia (Spain)
  • 11. Technische Universitaet Muenchen, Excellence Cluster Universe, Garching (Germany)
  • 12. Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, Catania (Italy)
  • 13. ISEC Coimbra, Coimbra (Portugal)
  • 14. Johann Wolfgang Goethe-Universitaet, Institut fuer Kernphysik, Frankfurt (Germany)
  • 15. Russian Academy of Science, Institute for Nuclear Research, Moscow (Russian Federation)
  • 16. GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany)
  • 17. Universita di Milano, Dipartimento di Fisica, Milano (Italy)
  • 18. Technische Universitaet Dresden, Dresden (Germany)
  • 19. Academy of Sciences of Czech Republic, Nuclear Physics Institute, Rez (Czech Republic)
  • 20. University of Cyprus, Department of Physics, Nicosia (Cyprus)
  • 21. Lawrence Berkeley National Laboratory, Berkeley, CA (United States)
  • 22. Universita di Torino, Dipartimento di Fisica Generale, Torino (Italy)

Description

Results on pp, π+π+, and π-π- intensity interferometry are reported for collisions of Ar+KCl at 1.76A GeV beam energy, studied with the High Acceptance Di-Electron Spectrometer (HADES) at SIS18/GSI. The experimental correlation functions as a function of the relative momentum are compared to model calculations allowing the determination of the space-time extent of the corresponding emission sources. The ππ source radii are found significantly larger than the pp emission radius. The present radii do well complement the beam-energy dependences of Gaussian source radii of the collision system of size A + A ≅ 40 + 40. The pp source radius at fixed beam energy is found to increase linearly with the cube root of the number of participants. From this trend, a lower limit of the pp correlation radius is deduced. (orig.)

Availability note (English)

Available from: http://dx.doi.org/10.1140/epja/i2011-11063-x

Additional details

Identifiers

Publishing Information

Journal Title
European Physical Journal. A
Journal Volume
47
Journal Issue
5
Journal Page Range
8 p.
ISSN
1434-6001

Optional Information

Collaborations
HADES Collaboration