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Dilepton production in pp and CC collisions with HADES

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Abstract.

e + e - production was studied using the High Acceptance DiElectron Spectrometer (HADES). In pp collisions at 2.2GeV kinetic beam energy, the exclusive η production and the Dalitz decay η→γe + e - have been reconstructed. The electromagnetic form factor of the latter decay was found to be in good agreement with the existing theoretical predictions. In addition, an inclusive e + e - invariant-mass spectrum from the 12C + 12C reaction at 2AGeV is presented and compared with a simplified thermal model.

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Authors and Affiliations

  1. Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare, 95125, Catania, Italy

    C. Agodi, G. Bellia, P. Finocchiaro & S. Spataro

  2. Dipartimento di Fisica e Astronomia, Università di Catania, 95125, Catania, Italy

    G. Bellia

  3. Departamento de Fısica da Universidade de Coimbra, LIP, 3004-516, Coimbra, Portugal

    A. Blanco, P. J. R. Fonte, L. Lopes & A. Mangiarotti

  4. ISEC, Coimbra, Portugal

    P. J. R. Fonte

  5. Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30059, Cracow, Poland

    A. Balanda, A. Kozuch, B. Michalska, J. Otwinowski, M. Palka, W. Przygoda, P. Salabura, R. Trebacz, M. Wisniowski & T. Wojcik

  6. Gesellschaft für Schwerionenforschung mbH, 64291, Darmstadt, Germany

    P. Braun-Munzinger, T. Galatyuk, D. González-Dıaz, R. Holzmann, I. Koenig, W. Koenig, B. W. Kolb, S. Lang, S. Lange, J. Pietraszko, A. Rustamov, A. Schmah, R. Simon, J. Stroth, C. Sturm, M. Sudol, M. Traxler & P. Zumbruch

  7. Institut für Kern- und Hadronenphysik, Forschungszentrum Rossendorf, PF 510119, 01314, Dresden, Germany

    F. Dohrmann, E. Grosse, B. Kämpfer, K. Kanaki, R. Kotte, L. Naumann, A. Sadovsky & J. Wüstenfeld

  8. Technische Universität Dresden, 01062, Dresden, Germany

    E. Grosse

  9. Joint Institute of Nuclear Research, 141980, Dubna, Russia

    A. Belyaev, S. Chernenko, O. Fateev, A. Ierusalimov & Y. Zanevsky

  10. Institut für Kernphysik, Johann Wolfgang Goethe-Universität, 60486, Frankfurt, Germany

    I. Fröhlich, M. Heilmann, J. Markert, C. Müntz, Y. C. Pachmayer, H. Ströbele, J. Stroth, M. Sudol & K. Teilab

  11. II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392, Giessen, Germany

    G. Agakishiev, M. Destefanis, C. Gilardi, D. Kirschner, W. Kühn, V. Metag, D. Mishra, R. Novotny, V. Pechenov, O. Pechenova, T. Pérez Cavalcanti, B. Spruck & H. Wen

  12. Sezione di Milano, Istituto Nazionale di Fisica Nucleare, 20133, Milano, Italy

    I. Iori

  13. Dipartimento di Fisica, Università di Milano, 20133, Milano, Italy

    I. Iori

  14. Institute for Nuclear Research, Russian Academy of Science, 117312, Moscow, Russia

    M. Golubeva, F. Guber, A. Ivashkin, T. Karavicheva, A. Kurepin, A. Reshetin & I. Veretenkin

  15. Physik Department E12, Technische Universität München, 85748, Garching, Germany

    M. Böhmer, T. Christ, T. Eberl, L. Fabbietti, J. Friese, R. Gernhäuser, M. Jurkovic, R. Krücken & B. Sailer

  16. Department of Physics, University of Cyprus, 1678, Nicosia, Cyprus

    Ch. Hadjivasiliou, J. Mousa & H. Tsertos

  17. Institut de Physique Nucléaire d'Orsay, CNRS/IN2P3, 91406, Orsay Cedex, France

    J. L. Boyard, T. Hennino, E. Moriniere, B. Ramstein & M. Roy-Stephan

  18. Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068, Rez, Czech Republic

    F. Krizek, A. Kugler, P. Tlusty & V. Wagner

  19. Departamento de Fısica de Partıculas, University of Santiago de Compostela, 15782, Santiago de Compostela, Spain

    D. Belver, P. Cabanelas, E. Castro, J. A. Garzón, J. Lamas-Valverde & J. Marın

  20. Instituto de Fısica Corpuscular, Universidad de Valencia-CSIC, 46971, Valencia, Spain

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Authors
  1. I. Fröhlich
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  2. G. Agakishiev
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Fröhlich, I., Agakishiev, G., Agodi, C. et al. Dilepton production in pp and CC collisions with HADES. Eur. Phys. J. A 31, 831–835 (2007). https://doi.org/10.1140/epja/i2006-10253-y

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  • DOI: https://doi.org/10.1140/epja/i2006-10253-y

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