EPJ Web Conf.
Volume 199, 2019MESON 2018 – 15th International Workshop on Meson Physics
|Number of page(s)||7|
|Published online||01 February 2019|
Time-Like Baryon Transitions studies with HADES
1 Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Univ. Paris-Saclay, 91406 Orsay, France
2 Institute of Nuclear Physics, Polish Academy of Sciences, 31342 Kraków, Poland
3 Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
4 GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
5 Technische Universität Darmstadt, 64289 Darmstadt, Germany
6 Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
7 Joint Institute of Nuclear Research, 141980 Dubna, Russia
8 Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany
9 Excellence Cluster ‘Origin and Structure of the Universe’, 85748 Garching, Germany
10 Physik Department E62, Technische Universität München, 85748 Garching, Germany
11 II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
12 Forschungszentrum Juelich, 52428 Juelich, Germany
13 Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
14 Institute of Theoretical and Experimental Physics, 117218 Moscow, Russia
15 National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409 Moscow, Russia
16 Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
17 LIP-Laboratório de Instrumentação e Física Experimental de Partículas, 3004-516 Coimbra, Portugal
18 Nuclear Physics Institute, The Czech Academy of Sciences, 25068 Rez, Czech Republic
19 LabCAF. F. Física, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain
20 Dipartimento di Fisica and INFN, Università di Torino, 10125 Torino, Italy
21 Bergische Universität Wuppertal, 42119 Wuppertal, Germany
* e-mail: email@example.com
a also at ISEC Coimbra, Coimbra, Portugal
b also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
c also at Technische Universität Dresden, 01062 Dresden, Germany
d also at Frederick University, 1036 Nicosia, Cyprus
Published online: 1 February 2019
The HADES collaboration uses the e+e− production as a probe of the resonance matter produced in collisions at incident energies of 1-3.5 GeV/nucleon at GSI. Elementary reactions provide useful references for these studies and give information on resonance Dalitz decays (R→Ne+e−). Such processes are sensitive to the structure of time-like electromagnetic baryon transitions in a kinematic range where (off-shell) vector mesons play a crucial role. Results obtained in proton-proton reactions and in a commissioning pion-beam experiment are reported and prospects for future pion beam experiments and for first hyperon Dalitz decay measurements are described. The connection with the investigations of medium effects to be continued with HADES in the next years at SIS18 and SIS100 is also discussed.
© The Authors, published by EDP Sciences, 2019
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