Hadron production in C+C at 2 A GeV measured by the HADES spectrometer

Tlusty, P.; Agakichiev, G.; Agodi, C.; Alvarez-Pol, H.; Atkin, E.; Balanda, A.; Bellia, G.; Belver, D.; Bielcik, J.; Böhmer, M.; Bokemeyer, H.; Boyard, J.; Braun-Munzinger, P.; Chepurnov, V.; Chernenko, S.; Christ, T.; Coniglione, R.; Daues, H.; Diaz, J.; Djeridi, R.; Dohrmann, F.; Duran, I.; Eberl, T.; Emeljanov, V.; Fabbietti, L.; Fateev, O.; Fernandez, C.; Finocchiaro, P.; Friese, J.; Fröhlich, I.; Fuentes, B.; Garzon, J.; Gernhäuser, R.; Golubeva, M.; Gonzalez, D.; Grosse, E.; Guber, F.; Hehner, J.; Heinz, T.; Hennino, T.; Hlaváè, S.; Hoffmann, J.; Holzmann, R.; Ierusalimov, A.; Iori, I.; Jaskula, M.; Jurkoviè, M.; Kämpfer, B.; Kanaki, K.; Karavicheva, T.; Koenig, I.; Koenig, W.; Kolb, B.; Kopf, U.; Kotte, R.; Kotuliè-Bunta, J.; Krücken, R.; Kugler, A.; Kühn, W.; Kulessa, R.; Kurepin, A.; Kurtukian-Nieto, T.; Lang, S.; Lehnert, J.; Maiolino, C.; Marín, J.; Markert, J.; Mishin, Y.; Montes, N.; Mousa, J.; Münch, M.; Müntz, C.; Naumann, L.; Novotný, J.; Ott, W.; Otwinowski, J.; Pachmayer, Y.; Panebratsev, Y.; Pechenov, V.; Perez, T.; Pietraszko, J.; Pleskaè, R.; PospíIl, V.; Przygoda, W.; Rabin, N.; Ramstein, B.; Reshetin, A.; Ritman, J.; Rodriguez Prieto, G.; Roy-Stephan, M.; Rustamov, A.; Sabin Fernandez, J.; Sadovsky, A.; Sailer, B.; Salabura, P.; Sanchez, M.; Sapienza, P.; Schmah, A.; Schroeder, C.; Schwab, E.; et al.

Hadron production in C+C at 2 A GeV measured by the HADES spectrometer

Tlusty, P.; Agakichiev, G.; Agodi, C.; Alvarez-Pol, H.; Atkin, E.; Balanda, A.; Bellia, G.; Belver, D.; Bielcik, J.; Böhmer, M.; Bokemeyer, H.; Boyard, J.; Braun-Munzinger, P.; Chepurnov, V.; Chernenko, S.; Christ, T.; Coniglione, R.; Daues, H.; Diaz, J.; Djeridi, R.; Dohrmann, F.; Duran, I.; Eberl, T.; Emeljanov, V.; Fabbietti, L.; Fateev, O.; Fernandez, C.; Finocchiaro, P.; Friese, J.; Fröhlich, I.; Fuentes, B.; Garzon, J.; Gernhäuser, R.; Golubeva, M.; Gonzalez, D.; Grosse, E.; Guber, F.; Hehner, J.; Heinz, T.; Hennino, T.; Hlaváè, S.; Hoffmann, J.; Holzmann, R.; Ierusalimov, A.; Iori, I.; Jaskula, M.; Jurkoviè, M.; Kämpfer, B.; Kanaki, K.; Karavicheva, T.; Koenig, I.; Koenig, W.; Kolb, B.; Kopf, U.; Kotte, R.; Kotuliè-Bunta, J.; Krücken, R.; Kugler, A.; Kühn, W.; Kulessa, R.; Kurepin, A.; Kurtukian-Nieto, T.; Lang, S.; Lehnert, J.; Maiolino, C.; Marín, J.; Markert, J.; Mishin, Y.; Montes, N.; Mousa, J.; Münch, M.; Müntz, C.; Naumann, L.; Novotný, J.; Ott, W.; Otwinowski, J.; Pachmayer, Y.; Panebratsev, Y.; Pechenov, V.; Perez, T.; Pietraszko, J.; Pleskaè, R.; PospíIl, V.; Przygoda, W.; Rabin, N.; Ramstein, B.; Reshetin, A.; Ritman, J.; Rodriguez Prieto, G.; Roy-Stephan, M.; Rustamov, A.; Sabin Fernandez, J.; Sadovsky, A.; Sailer, B.; Salabura, P.; Sanchez, M.; Sapienza, P.; Schmah, A.; Schroeder, C.; Schwab, E.; Senger, P.; Simon, R.; Smolyankin, V.; Smykov, L.; Spataro, S.; Stelzer, H.; Stroebele, H.; Stroth, J.; Sturm, C.; Sudol, M.; Titov, A.; Toia, A.; Traxler, M.; Tsertos, H.; Vazquez, A.; Volkov, Y.; Wagner, V.; Walus, W.; Wang, Y.; Winkler, S.; Wisniowski, M.; Wojcik, T.; Wüstenfeld, J.; Zanevsky, Y.; Ovinec, D.; Zumbruch, P.

The C+C reaction at 2 A GeV has been recently studied using the HADES spectrometer installed at GSI Darmstadt,with the main aim to reconstruct the dielectron signal from the decay of low mass vector mesons.We have analyzed the data with respect to emission of charged hadrons,in order to study production of ð mesons from excited nuclear matter with high temperature and high energy density.
Efficient hadron identification is also important for dielectron analysis.The main source of electron pairs at this energy is the neutral ð meson Dalitz decay,so normalization of its yield to charged ð mesons is a natural way for data presentation.Analysis of produced hadrons also allows event characterization,and check of the detector performance. The particle identification method (PID),based on a likelihood technique to select the most probable particle type,is described.In case of hadrons,the particle momentum,velocity and energy loss are used for the PID decision.The performance of the method is evaluated in detailed simulations.
Preliminary results of analysis of charged hadron production are presented.The particle yields and transverse mass distributions are shown and interpreted in terms of the thermal model.Results are compared with existing data from previous experiments.

Lecture (Conference)
XLII International Winter Meeting on Nuclear Physics, 25.01.-01.02.2004, Bromio, Italy
Contribution to external collection
XLII International Winter Meeting on Nuclear Physics Bormio, Riceria Scientifica ed Educazione Permanente Supplemento (2004), 171-179

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