DIELECTRON PRODUCTION IN C + C AND p + p COLLISIONS WITH HADES

Author:

,Pietraszko J.1,Agakishiev G.2,Agodi C.3,Balanda A.4,Bellia G.35,Belver D.6,Belyaev A.7,Blanco A.8,Böhmer M.9,Boyard J. L.10,Braun-Munzinger P.1,Cabanelas P.6,Castro E.6,Chernenko S.7,Christ T.9,Destefanis M.2,Díaz J.11,Dohrmann F.12,Durán I.6,Eberl T.9,Fabbietti L.9,Fateev O.7,Finocchiaro P.3,Fonte P. J. R.813,Friese J.9,Frhölich I.14,Galatyuk T.1,Garzón J. A.6,Gernhóuser R.9,Gilardi C.2,Golubeva M.15,González-Díaz D.1,Grosse E.1216,Guber F.15,Hadjivasiliou Ch.17,Heilmann M.14,Hennino T.10,Holzmann R.1,Ierusalimov A.7,Iori I.1819,Ivashkin A.15,Jurkovic M.9,Kämpfer B.12,Kanaki K.12,Karavicheva T.15,Kirschner D.2,Koenig I.1,Koenig W.1,Kolb B. W.1,Kotte R.12,Krizek F.20,Krücken R.9,Kugler A.20,Kühn W.2,Kurepin A.15,Lamas-Valverde J.6,Lang S.1,Lange S.1,Lopez L.8,Mangiarotti A.8,Marín J.6,Markert J.14,Metag V.2,Michalska B.4,Mishra D.2,Moriniere E.10,Mousa J.17,Münch M.1,Müntz C.14,Naumann L.12,Novotny R.2,Otwinowski J.4,Pachmayer Y. C.14,Palka M.4,Pechenov V.2,Pérez T.2,Pleskac R.20,Pospísil V.20,Przygoda W.4,Ramstein B.10,Reshetin A.15,Roy-Stephan M.10,Rustamov A.14,Sadovsky A.12,Sailer B.9,Salabura P.4,Schmah A.1,Senger P.1,Shileev K.15,Simon R.1,Spataro S.3,Spruck B.2,Ströbele H.14,Stroth J.114,Sturm C.1,Sudol M.114,Teilab K.14,Tlusty P.20,Traxler M.1,Trȩbacz R.4,Tsertos H.17,Veretenkin I.15,Wagner V.20,Wen H.2,Wiśniowski M.4,Wójcik T.4,Wüstenfeld J.12,Zanevsky Y.7,Zumbruch P.1

Affiliation:

1. Gesellschaft für Schwerionenforschung mbH, 64291 Darmstadt, Germany

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

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

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

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

6. Departamento de Física de Partículas. University of Santiago de Compostela, 15782 Santiago de Compostela, Spain

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

8. LIP-Laboratório de Instrumentação e Física Experimental de Partículas, Departamento de Física da Universidade de Coimbra, 3004-516 Coimbra, Portugal

9. Physik Department E12, Technische Universität Mnchen, 85748 Garching, Germany

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

11. Instituto de Física Corpuscular, Universidad de Valencia-CSIC, 46971-Valencia, Spain

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

13. ISEC Coimbra, Portugal

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

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

16. Technische Universität Dresden, 01062 Dresden, Germany

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

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

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

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

Abstract

The High Acceptance Di-Electron Spectrometer HADES1 has been constructed at the SIS accelerator (GSI Darmstadt) to investigate electron-positron pairs produced in proton, pion and heavy ion induced reactions. The main goal of these studies is to explore properties of hadrons in nuclear matter. The apparatus and the experimental results from C + C at 2.0 AGeV and 1.0 AGeV and p + p at 2.2 GeV compared with Monte-Carlo events from a generator based on known cross-sections and branching ratios are presented.

Publisher

World Scientific Pub Co Pte Lt

Subject

Astronomy and Astrophysics,Nuclear and High Energy Physics,Atomic and Molecular Physics, and Optics

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